LG OLED G6 (G64LW, G66LS) vs Samsung QN80H

The LG G6 is currently one of the brightest OLEDs on the market. Its peak brightness reaches nearly 2500 nits and, best of all, this translates directly to real movie scenes. The TV flawlessly extracts details in the bright areas of the image. And this is regardless of whether we are talking about very small points in the form of stars in the sky or slightly larger elements on the screen. Naturally, with full-screen, uniformly white scenes, the brightness of the G6 drops due to the panel protection system (ABL). However, in real, varied movie shots, this value still hovers around an impressive 2000 nits, which can be considered a remarkable result. The coverage of the color palette also deserves praise. The new 2nd generation Tandem OLED panel has brought about only a cosmetic change, but still an improvement. The coverage of the DCI-P3 color space reaches nearly 99.5%, while the ultra-wide BT.2020 is around 84%. These are very good results, although it's important to remember one thing: at extremely high brightness levels, the volume of colors will be lower than in QD-OLED panels from Samsung Display due to the use of white sub-pixels (WOLED). However, in everyday content and most films, capturing this difference will be very difficult.

The Samsung QN80H is undoubtedly a bright TV. In synthetic tests it exceeds the 1000‑nit mark, which on paper already promises a solid HDR effect. In practice the screen really shows its stuff, although it can't always fully spread its wings (or its backlight 🤔). The best impression comes from bright, wide shots. Sunlit landscapes or heavily lit scenes look really good on it. Brightness then sits around 700 nits, which delivers a noticeable step up compared with standard SDR. Problems start in dark scenes with small, pinpoint highlights. The QN80H tends to dim those aggressively to protect black depth at all costs. On one hand you get better contrast, on the other... you lose dynamics and the sparkle of fine HDR detail. The TV therefore has plenty of potential, but the local‑dimming algorithm can be too restrictive.

Colour‑gamut coverage

Colour-wise it’s also good. The QN80H uses quantum‑dot technology, and in our measurements it covered 93% of the DCI‑P3 colour space and about 70% of BT.2020. Those results won't drop anyone's jaw today, but in real‑world use they’re more than enough to deliver a vivid and natural picture for most films and series. Colours are suitably saturated and, after proper tuning, they don't look artificial or overly aggressive.

We tested the LG G6 in the best factory mode for colour fidelity, which is FILMMAKER MODE. In the case of our test unit, this mode was reasonably well tuned straight out of the box. In SDR content, the only issue we noticed was the white balance, which leaned towards warmer tones. This made the image occasionally appear slightly yellowish, but overall, it wasn't a significant problem. The G6 performed a bit worse in HDR content. There, the white balance showed too much blue component. This caused the image to veer towards cooler shades, resulting in quite noticeable errors. As can be seen on our ColorChecker chart, the colours shifted towards these cooler registers. Nevertheless, considering the factory settings, the television presented a perfectly decent level. However, we know that OLED screens – particularly those from LG – respond exceptionally well to professional calibration, so we immediately proceeded to do just that.

The QN80H’s factory settings performed really well, especially compared with most TVs that come through our tests. Of course we took measurements in Filmmaker Mode, and that’s the mode we recommend switching on right after the initial setup. For SDR content our sample was set up surprisingly well. The white balance was very even, colours looked natural, and errors were so small they were hard to spot without test equipment. The only weaker point was the gamma. In brighter parts of the picture the TV brightened them a little too much, so the image sometimes lost some depth. Even so, we wish most TVs looked this good straight out of the box.

It was a bit worse in HDR. The white balance was still set correctly, so the issue wasn’t colour but the way the QN80H managed image brightness. You could see that straight away on the EOTF chart. The TV brightened large parts of scenes too much, causing the brightest elements to blow out. Interestingly, very small highlights were often dimmed too much at the same time. As a result some fine details simply disappeared. The factory Filmmaker mode in HDR isn’t bad, but it’s definitely not as well tuned as it is in SDR.

After completing a professional calibration, we gained complete control over the panel, and we managed to align all parameters to nearly zero. We were able to tune the white balance perfectly, which removed the factory's cool and warm tints from the screen. The effects are visibly clear in the ColorChecker test – the average colour reproduction errors dropped below the critical value of 1-2. And what does this mean? PERFECT colours, without any distortion! However, as a reviewer’s duty, we must point out how the LG G6 arbitrarily manipulates brightness, which is due to the EOTF curve's behavior. When we look at the standard synthetic graph, it might seem that the line is quite straight. However, the situation changes when we turn on the measurement filter, which shows how the television interprets brightness in actual, moving film scenes (EOTF in MOVIES). Then, it is clear as day that some of the smallest fragments on the screen are slightly overly brightened by the algorithm. Of course, for the average viewer, such a deviation will practically go unnoticed, but in the test of such an expensive screen, it’s worth noting – especially since we are talking about a model that has huge aspirations for the title of the best television of the year.

The biggest difference after calibration was in HDR Filmmaker mode. SDR was already very good out of the box, so we didn't have much work to do there. In HDR, however, we were able to rein in how the QN80H handled brightness; it had been making most scenes too bright. After calibration the picture is calmer, more natural and much closer to a faithful reproduction.

No matter what one might say about the G6's issues with near-black signal, it must be fairly acknowledged that it handles heavily compressed material and lower resolution content extremely well. All unwanted, ugly tonal transitions are effectively reduced here by the "Smooth Gradation" feature. At the "Low" setting, the algorithm works flawlessly – effectively masking the artifacts resulting from strong compression without destroying the sharpness and details in the frame. Higher levels of this feature do further smooth the image, but they start to blur the real texture elements of the objects, so we recommend keeping this slider at a low level. As for the actual upscaling to 4K, the processor does an excellent job – edge sharpness and detail reconstruction are at the highest level, and in this respect, the G6 is on par with the global leaders.

The digital image processing in the Samsung QN80H is handled by the second-generation NQ4 AI processor. It's a chip we've already seen in previous Samsung models and it still performs very well, especially with lower-resolution content. The image is effectively upscaled to 4K, but without excessive sharpening and without making it feel like the TV is trying to forcibly enhance the source material.

The "Noise Reduction" feature also proves useful. It can noticeably reduce posterisation and visible banding in lower-quality material, especially in low-bitrate streaming. However, you should remember it doesn't work without side effects. It can remove some film grain and slightly smooth the picture. So with a good-quality source we'd leave this feature turned off. If, however, banding and uneven tonal transitions bother you more than the loss of some grain, "Noise Reduction" can be a really useful addition.

The LG G6 is an OLED television, so in the category of motion fluidity, it traditionally deserves the highest marks. The TV supports very high refresh rates of up to 165 Hz in 4K resolution, but most importantly – there are absolutely no signs of blurring on the screen. The response time of the matrix is virtually instant, ensuring that dynamic images remain perfectly sharp.

Motion blur and motion handling on the QN80H are really good, mainly thanks to the fast panel. In 4K the screen refreshes the image at up to 144 Hz, and when switched to Full HD and connected to a PC it can reach up to 240 Hz. That's new for Samsung TVs and a handy extra for people who want to use the TV for PC gaming. We were more interested, though, in how the QN80H performs at 120 Hz, because consoles use that refresh rate. It does very well. The panel doesn't suffer much from the smearing typical of VA panels; faint trails behind moving objects are mostly visible on dark backgrounds. That's not something that would interfere with normal sports watching or gaming. The TV also has a motion smoothing system that Samsung calls "Picture Clarity". You can set judder reduction and blur reduction separately, so it's easy to tune it for films, sport or your own preferences.

The LG G6 is a true beast for gamers and one of the best-equipped TVs on the market in this regard. The manufacturer didn't compromise and equipped this model with four full HDMI 2.1 ports with a maximum bandwidth of 48 Gbps. This means that no matter which port you plug in your PlayStation 5, Xbox Series X, or powerful PC, you'll get the absolute maximum performance out of them.

The TV supports a full suite of gaming technologies: from VRR (Variable Refresh Rate), to AMD FreeSync Premium Pro, and Nvidia G-Sync Compatible. Let's add to that a remarkably low, almost imperceptible input lag and an excellently functioning game panel (Game Optimizer), which allows you to constantly monitor signal parameters. Gaming on this screen, with the perfect black of OLED and powerful refresh rates, is pure pleasure.

The Samsung QN80H is a TV that performs very strongly when it comes to gamer-focused features. The biggest new feature for 2026 is DLG mode, which allows refresh rates up to 240 Hz when the image is switched to Full HD. It's an option aimed mainly at PC users, but it also shows that Samsung is still investing heavily in the gaming side of its TVs. The list of advantages doesn't end there. The QN80H has four full HDMI 2.1 ports, which at this price point still isn't standard. So you can connect multiple consoles, a PC or a soundbar at once and not worry about which port supports the full video capabilities. The TV also supports VRR, ALLM and HGiG, so it's hard to fault its basic feature set.

A downside is the lack of Dolby Vision, which could matter especially for Xbox Series X owners. However, this isn't a flaw that rules the QN80H out as a gaming TV. Samsung does have a feature that most manufacturers still lack, namely its proprietary motion smoothing, Game Motion Plus. This motion smoother also works in game mode, improving the smoothness of titles running at 30 or 60 frames per second without a drastic increase in input lag. In practice, Game Motion Plus can make a much bigger difference than Dolby's codec, especially in more demanding games that don't offer a 60 fps mode. The image becomes noticeably smoother, while controls remain sufficiently responsive. So despite the lack of Dolby Vision, the QN80H is still one of the best-equipped gaming TVs in its class.