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LG UK7700 vs SK8000 Review (55UK7700 vs 55SK8000, 65UK7700 vs 65SK8000) – What are their differences?

by on November 5, 2018
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LG UK7700 vs SK8000

LG UK7700 and SK8000 are parts of LG’s 2018 mid range 4K HDR LED TV lineup. Like most of other models of LG LED TV lineup, both LG SK8000 and UK7700 also come with IPS panel technology that makes them have wide viewing angle coverage and be a good choice for a room with wide seating.  But even so, as is typical of TVs with IPS panel, these TVs are not suitable when used in a dark room due their low native contrast ratio.  In the market, SK8000 comes in 3 screen sizes option including 49 Inch (49SK8000PUA), 55 inch (55SK8000PUA), and 65 inch (65SK8000PUA) while UK7770 comes in 2 screen sizes option only including 55 inch (55UK770PUD) and 65 inch (65UK7700PUD). And with the same screen (55UK7700 vs 55SK8000, 65UK7700 vs 65SK8000), LG UK7000 is sold about hundred dollar cheaper than SK8000. So, what are their differences and which is a better choice between them?

LG UK7700 vs SK8000 Key Specs

Specs and Features LG UK7700 LG SK8000
Size 55 Inch (55UK7700PUD), 65 Inch (65UK7700PUD) 49 Inch (49SK8000PUA), 55 Inch (55SK8000PUA), and 65 Inch (65SK8000PUA)
Resolution 4K (2160 x 3840) 4K (2160 x 3840)
Panel Type IPS Panel IPS Panel
Backlighting Edge-Lit LED Edge-Lit LED
Local Dimming Yes Yes
Picture Engine - Alpha 7 Intelligent Processor
HDR Formats HDR 10, HLG HDR 10, Dolby Vision, HLG, Advanced HDR by Technicolor
Nano Cell Color Yes Yes
Tru Color Accuracy Yes Yes
Support wide color gamut Yes Yes
Support 10 Bit depth of color Yes Yes
Ultra Luminance Yes Yes
Nano Cell Black Yes Yes
UHD Up-scaling Yes (Tru 4k Up-Scaler) Yes (Tru 4k Up-Scaler)
Motion Clarity Tru Motion 120 Hz Tru Motion 240 Hz, 49SK8000 = TruMotion 120 Hz
Native Refresh rate 60 Hz 120 Hz, 49SK8000 = 60 Hz
Smart TV WebOS 4.0 with LG’s AI ThinQ WebOS 4.0 with LG’s AI ThinQ
LG Magic Remote Yes Yes
Audio Channel 2.0 2.0
Output Power 20 watts 20 watts
Support Dolby Atmos No Yes
HDMI Ports 4 4
USB Ports 2 3
Prices See the Price on Amazon See the price on Amazon

Features and Technologies of LG SK8000 and UK7700

The differences


Alpha 7 Intelligence Processor

One of the main differences between LG UK7700 and SK8000 is about their processor. As we see on the comparison table above, LG SK8000 has been powered by the Alpha & Intelligence Processor while UK7700 is not yet. Not just for SK8000, the Alpha 7 is also used by the higher series like SK9000, SK9500, and OLED B8. Although its performance is not as powerful as the Alpha processor, but at least, it is better than the processor of UK770, particularly in maximizing images details.  Additionally, Alpha 7 processor also makes smart TV performance of SK8000 is faster and more responsive than UK7700, even though they are featuring the same smart TV platform.

HDR Support

The other advantage offered by LG SK8000 as the higher series is about the HDR format they support. For this case, LG UK7700 supports HDR10 and HLG only while for SK8000, in addition to it supports the HDR format that supported by UK7700, it also already supports Dolby Vision by Dolby Laboratories and Advanced HDR by Technicolor. This certainly makes SK8000 allows you to watch movies in more HDR format options than UK7700.

Motion Technology

Except its 49 inch model (49SK800PUA), for maximizing its performance when playing fast moving images like sports, fast movies, or games, LG SK8000 is powered by TruMotion 240 Hz technology based on native 120 Hz refresh rate panel. Meanwhile, LG UK7700 is only powered by Tru Motion 120 Hz based on native 60 Hz refresh rate panel. The other advantage of SK8000, it also has an option 60 Hz BFI (Black Frame Insertion) mode that very helpful to make motion looks clearer, particularly caused by 60 fps persistence. On the other hand, UK77000 doesn’t have this feature.

Dolby Atmos Decoder

Both LG UK7700 and SK8000 may equally equipped with 2.0 channel speaker system with 20 watts of total sound output, but their difference, SK8000 already support Dolby Atmos while UK7700 doesn’t. This means, with SK8000 you can enjoy Dolby Atmos Sound experience while withy UK7700, you cannot. But even so, since it only has standard 2.0 channel speaker system and doesn’t have built-in woofer, to enjoy Dolby Atmos experience, you need an additional external sound system or sound bar.

The Number of USB ports

Both LG SK8000 and UK7000 may have 4 HDMI ports as their major connectivity, but the number of their USB ports is different. As we see on comparison table above, SK8000 is equipped with 3 USB ports while UK7700 is only equipped with 2 USB ports. But even, none of their USB ports is USB 3.0 that means all of their USB ports are USB 2.0.

The Similarities

Nano Cell Display


The excepting of what we have mentioned above, both LG UK7700 and SK8000 have the same features and are also powered by the same technology. On their panel, they equally use IPS panel with Edge-Led backlight and local dimming technology. But fortunately, for this case, we don’t clearly know, how many dimming zones of each of their local dimming. Additionally, for maximizing their color reproduction, both of them are also equally powered by Nano Cell Display Technology and some other technology like Tru Color Accuracy, Billion Rich Color, and others. Additionally, both of them also equally have a technology called “Nano Cell Black” that has a function to improve their performance in producing black. Otherwise, for maximizing their peak brightness, they also equally have a technology called “Ultra Luminance”.  And for maximizing the clarity of images when they are playing no 4K content, both of them are also equally powered by a UHD up-scaling engine called “Tru 4K Up-Scaler”. This means, no matter the resolution of the source, whether it is SD content, HD content, or Full HD content, you can enjoy them with the quality as close as possible to 4K resolution.

And as their smart TV platform, both of them are also equally featuring WebOS 4.0. The excellence, WebOS 4.0 now has been integrated with LG AI ThinQ, a home intelligence system by LG that allows you to control and monitor you ThinQ AI compatible devices via your TV with your voice commands. Not even just that, it also already supports Amazon Alexa that means you can also monitor and control your Amazon Alexa compatible devices via your LG TV. Additionally, ThinQ AI also makes its voice navigation is far better. This feature is just like Smart Things and Samsung’s Bixby Voice Assistant on Tizen or Google Home and Google Voice Assistant on Android TV.

>> Please click here to see the price of LG UK7700 on Amazon <<

>> Please click here to see the price of LG SK8000 on Amazon <<

LG UK7700 vs SK8000 Performance

Picture Quality

Contrast and Black Level

As is typical of IPS TV, the native contrast ratio of LG SK8000 and UK7000 is weak, make them cannot produce deep black. The poor performance of them in producing black will be noticeable when they are used in a dark room. Black will tend to look grey than really black, makes dark scene look a bit washed-out. Additionally, their black uniformity is also poor. Both of them may equally have local dimming and Nano Cell Black that designed for improving black produced, but for this situation, they don’t help much. Additionally, since they cannot produce deep black, this certainly makes them cannot show shadow details of HDR images excellently like the creator intended. So, for you who often watch TV in a dark room or watch movies with a lot of dark scene like Thriller or Horror, both of these TVs may not good choice for you. Fortunately, once they are set in a bright room, the picture displayed on their screen will look far better due the impact of high native contrast ratio is not as sensitive as in a dark room. And since most people watch TV in a moderately bright room, this should not be a major problem for both. This means, if you don’t like watch TV in a dark room, you can ignore their low performance in producing black.


While their performance in dark room is equally poor, once they set in a bright room, the picture displayed on their screen will look far better. But even so, this is just for a dim room or a moderately bright room with not much light. Meanwhile, when set in a room with much light, their peak brightness is not bright enough to overcome the glare and the picture displayed on their screen looks too dim. Compare between them, with SDR content, both of them may equally have peak brightness lower than 300 nits, but for this case, SK8000 has a bit brighter peak brightness than UK7700. But the excellence of UK7700, it can maintain its peak brightness across a number of window sizes.  On the other hand, the peak brightness of SK8000 depends on the window sizes. In small window size like a small highlight in a dark scene, its peak brightness is less than 100 nits, makes small highlight appears too dim. But even so, as the bright area increases, its peak brightness also rises, even when the bright area is more than a half, it can show bright objet brighter than 300 nits.  With HDR contents, both of them may be able to produce brighter peak brightness, but the increasing is not too significant. Just like with SDR content, UK7700 can sustain similar peak brightness at any sizes of bright areas. On the other hand, SK8000 can do a better job. Small bright object may not be still able to shown brighter than large bright objects, but at least, it can show small bright object much brighter than when with SDR content.

Overall, peak brightness of LG SK8000 and UK7700 is mediocre and only bright enough to make the picture looks bright in a dim room or moderately bright room, while when used in a very bright room, their peak brightness is too low, particularly when they are displaying HDR contents. With their peak brightness, you will not get the benefit offered by HDR content over SDR content. Let alone to show bright scene of HDR content brighter than 1000 nits like the creator intended, of course, their performance is still far from the expectation.

Color Reproduction

Although both LG UK7700 and SK8000 are equally powered by Nano Cell display technology, but SK8000 can deliver a bit wider color gamut than UK7700.But even so, overall, their color coverage in DCI P3 is good even though still less than 90% like what recommended. Additionally, their color coverage in Rec.2020 is also still acceptable. The result, although some certain colors like dark greens or others cannot be shown as accurate as a TV with wider color gamut, but overall, color of HDR images displayed on its screen still looks accurate. While SK8000 has a bit wider color gamut, on the other hand, UK7700 has a bit better color volume. And overall, their color volume is sub-par. They cannot show their color gamut at darker colors fairly well. Nevertheless, except darker colors, they can show their color gamut at their entire brightness fairly well. Overall, their colors rendition is good, but still worse than the competitor like Samsung NU8000 or Sony X850F. While color gamut of LG SK8000 and UK8000 is not too excellent, both of them equally have excellent color gradient. For this case, SK8000 also has better color gradient than UK7700 but their difference is not too noticeable. Both of them already support 10 bit depth of colors that means it can produce more than 1 billion shades of colors that means it is good for HDR DHR contents. The result, color gradient of HDR images displayed on their screen looks very smooth. Some little imperfections may be still visible in some certain colors but this should not be problem for a normal content.

Side Viewing Angle

VA Panel vs IPS Panel

The use of IPS panel may make both LG UK7700 and SK8000 cannot produce deep black, but on the other hand, this makes them have good side viewing angle coverage. What offered by them is still worse than OLED TV, but far better than VA TVs, particularly in maintaining black level. Just like on VA panel, color will fade and brightness will be decreased started at less than 30 degrees off center and front. But even so, as we have mentioned, the excellence of UK7700 and SK8000 is in maintaining their black level at extremely wide angle. If on VA TVs, black level usually will be degraded at less than 15 degrees off center and front, on their screen, black level can be maintained at far wider angle, even at extremely wide angle, their back level doesn’t degrade at all. For you who search TV to be placed in a room with wide seating, both of them may be a good choice for you.

Motion Handling and 24p Playback

Although the pixel response time of LG SK8000 is lower that means it is better than UK7700, but overall, their pixel response time is equally excellent. And this is very useful when they are playing fast moving images. And the result, when they are playing sports or fast movies, there are almost no motion blur visible. Following fast moving objects, there is only a faint short trail where most people may not notice this much.  But even so, some blurs that may be visible is more caused by persistence than pixel response time.  But for this case, SK8000 has an option mode that can minimize the blur that caused by persistence. Meanwhile, since both of them have local dimming technology, to dim their backlight, both UK7700 and SK8000 equally use PWM Dimming System with 120 Hz of frequency dimming. Their dimming frequency is actually relatively low, so this will bother some people who sensitive to flicker. Additionally, this will also cause some duplication when they are playing fast moving object. And as we have mentioned, for minimizing the blur that caused by persistence or backlight flicker, particularly when they are playing fast moving images, LG SK8000 has an optional BFI mode that allow it can flicker its backlight at 60 HZ. This is very effective to clear-up the motion, particularly for 60 fps content like video games or sports. But on the other hand, since it flicker its backlight at lower frequency, this certainly makes backlight flicker is more noticeable. Meanwhile, LG UK7700 doesn’t have an optional BFI mode.

When playing 24p videos, LG UK7700 can do a better job than UK7700. No matter the frame rate of the 24 movie, whether it is native 24p movies like DVD or Blu-Ray movies, via 60p signal like movies from streaming devices, via 60i signal like movies from satellite TV, or movies from streaming apps like YouTube, Netflix, and others, all of them will be shown smoothly and clearly with judder-free on its screen. Meanwhile, the ability of UK7700 in removing judder is only from native 24p movies or movies via streaming apps, while when the source is 24p movies via 60p or 60i signal, it cannot remove the judder completely. Fortunately, most of people don’t sensitive to judder, so this should not be problem for UK7700. Additionally, the advantage of SK8000 than UK7700 is about its ability interpolating lower frame rate content. Since SK8000 has native 120 HZ refresh rate panel, it can interpolate both 30 fps and 60 fps up to 120 Hz, while since UK7700 only has 60 HZ refresh rate panel, it can interpolate 30 fps only up to 60 Hz. Special for SK8000, this is not as true to 49SK8000 due it has native 60 Hz refresh rate panel.


As their major inputs/outputs, both LG UK7700 and SK8000 are equally equipped with 4 HDMI ports, where all of their HDMI ports have the same ability. All of their HDMI ports already support HDCP 2.2, CEC, and HDMI 2.0 Full bandwidth. Additionally, both of them also equally have 1 HDMI port that supports ARC that is on HDMI 2.  But for this case, since SK8000 already support Dolby Atmos, it can pass though Dolby Atmos signal via its HDMI ARC while UK7700 doesn’t support ARC. Meanwhile, about USB ports, SK8000 has 3 USB ports while UK7700 only has 2 ports where all of their HDMI ports are USB 2.0 and none of them is USB 3.0. In addition to HDMI and USB ports, both LG UK7700 and SK8000 also equally have 1 RF IN, 1 Digital Audio Out (optical), and 1 Ethernet port. The difference, UK7700 has 1 Composite In (AV In) while SK8000 doesn’t have.

Meanwhile, discussing about their input lags in PC and Game mode, for this case, UK7700 has a bit lower input lags than SK8000. Nevertheless, essentially, their input lags are excellent, even including the best in 2018. No matter the resolution of the source, the input lags of UK7700 is lower than 15 ms that means it is excellent for any game. On the other hand, except 4K with HDR at 60 Hz, the input lags of SK8000 are also lower than 15 ms. But at 4K with HDR at 60 Hz, the input lags of SK8000 is a bit higher, that is higher than 20 ms. But even so, it is still lower than 25 ms and still low enough for any games, even for fast paced games that require fast reflexes. With their excellent input lags and combined to their excellent motion handling and wide viewing angle coverage, this certainly make them as a good TV for .games, particularly for you who often play games with a group of your family or friend.

Smart TV

WebOS 4.0 Review

Like other models of LG’s 2018 4K TV lineup, both LG SK8000 and UK7700 equally run WebOS 4.0 as their smart TV platform. As we know, WebOS have intuitive user interface design and is also easy to navigate. There are not many changes on its home menu. Across the bottom of the screen, there is still a strip bar contain “tiles” that well-organized as the quick access to many apps, inputs, and menus. A little change is on the top right where there is now a quick access button for search functions, allows you to find something easily and faster.  Additionally, performance is also very responsive, faster and more responsive than Tizen OS or even Google Android TV. Nevertheless, it also depends on the processor that supports their TV. And since SK8000 is supported with faster chip, this certainly makes its smart TV performance is faster and more responsive than UK7700. Meanwhile, talking about apps provide, there are decent number of pre-installed apps like YouTube, Netflix, Amazon Videos, Web Browser, Live TV, Games, and many more. It also has an app store called “LG apps store”. Although what provided are not as complete and many as what provided by Google Play Store or Samsung apps store, but there are still a lot of apps, games, content provided. And the new, WebOS 4.0 now has been integrated with LG AI ThinQ, a home artificially intelligence system by LG. With ThinQ AI, you can monitor and control your ThinQ devices like Air Conditioner, Dish Washer, and more via your TV. Not just that, it also already supports Amazon Alexa, so not only ThinQ devices that can be monitored and controlled via your LG TV, but also Amazon Alexa Compatible devices. Additionally, LG AI ThinQ also makes their navigation is far excellent.

As their remote, both LG UK7700 and SK8000 are equally equipped with LG magic Remote. As we know, LG magic remote is an excellent remote with a lot of smart features. This remote is not as large as Sony smart remote, but bigger than Samsung smart remote. In addition to standard buttons like Volume buttons, change channel buttons, power buttons, and other, it also have some quick access button for common function and two dedicated button for Netflix and Amazon Videos. The excellent, at the center of the remote, there is a combination of direction pad and a clickable scroll wheel that makes the navigation is far easy and faster. Not just that, when you point the remote in the TVs’ screen, you can also move the cursor on the screen by moving the remote.  Like other smart remote, it is also equipped with built-in microphone for voice navigation and since its platform has been integrated with ThinQ AI, its voice command ability is far better, not for basic commands, but also some advanced command and searches. This remote also has a universal ability, allow you to control some basic functions of your other CEC compatible devices connected on your TV via HDMI ports.

>> Please click here to check the latest price of LG UK7700 on Amazon <<

>> Please click here to check the latest price of LG SK8000 on Amazon <<


Performance LG UK7700 LG SK8000
Picture Quality (3.6/5) (3.6/5)
HDR (3.7/5) (3.7/5)
Motion Handling (3.6/5) (4/5)
Inputs (4.9/5) (4.8/5)
Sound Quality (3.3/5) (3/5)
Smart TV (4.1/5) (4.1/5)


As we have discussed a lot above, there LG SK8000 as the higher series offer some advantages than UK7700. The main advantage that offered by SK8000, it is already powered by Alpha 7 processor that makes its performance is a bit better than UK7700 in some points like a bit wider color gamut, better motion handling when they are playing fast moving images, better judder handling when playing 24p movies, and others. Additionally, the other advantage that offered by SK8000, it already supports Dolby Atmos and most of HDR format like HDR10, HLG, Dolby Vision, and Advanced HDR while UK7700 supports HDR10 and HLG only. Nevertheless, in term of picture quality, there is no many advantage offered by SK8000 except it can provide a bit wider color gamut than UK7700. Overall, for their price, performance and picture quality of LG UK7700 and SK8000 is fairly good. But even so, since they have low native contrast ratio, both of these TVs are not suitable when used in a dark room.

So, which is a better choice between them? As we have mentioned above, with the same screen, SK8000 is sold about a hundred dollar more expensive than UK7700. And considering picture quality and performance offered, I think, SK8000 is a better choice. But even so, if you are not interested with some additional features offered by SK800, LG UK7700 is also not a bad choice. Now the decision comes back to you according to your own preferences and budgets.

>> Please click here to buy LG UK7700 on Amazon <<

>> Please click here to buy LG SK8000 on Amazon <<

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