LG OLED G6 (G64LW, G66LS) vs TCL X11L

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 has a direct impact on real film scenes. The television flawlessly pulls out details in the bright parts of the image. And this is regardless of whether we are talking about very small points like stars in the sky or slightly larger elements on the screen. Naturally, with full-screen, uniformly white scenes, the brightness of the G6 decreases due to the panel's protection system (ABL). However, in real, varied film shots, this value still hovers around 2000 nits, which can be considered an outstanding result. The coverage of the color palette also deserves praise. The new 2nd generation Tandem OLED panel brought only a cosmetic change, but still an improvement. The DCI-P3 color gamut coverage reaches nearly 99.5%, while the ultra-wide BT.2020 is around 84%. These are very good results, although one must 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 a white sub-pixel (WOLED). However, in everyday content and most films, detecting this difference will be very difficult.

Such a large number of zones translated not only into deep, inky blacks but also into the panel’s brightness. The X11L is an extremely bright TV. Peak brightness can easily exceed 4000 nits, and with the special "Boost" mode enabled, under specific conditions that brightness can even hover around the marketing figures of 9000–10,000 nits. This is undoubtedly one of the brightest, if not the brightest, screens on the market. But how do those numbers translate to real-world movie measurements? The results are very good, though of course far from the marketing promises. Our measured brightness in actual movie scenes hovered around 2000–3000 nits. That’s an outstanding result, considering that the vast majority of content is produced to those brightness levels, including the rarer material mastered to 4000 nits. But it also shows that the numbers the manufacturer brags about don’t always translate directly to the video content available at home. The only "quirk" (if you can call it that) is that when very small, bright elements appear on the screen, their brightness drops below 2000 nits. The dimming algorithm does this deliberately to preserve deep blacks and minimize halo. This is entirely understandable and the effect remains very strong, but it also demonstrates that even with such powerful hardware, Mini-LED technology has its limits and does not always work without compromise. In HDR, brightness isn’t the only thing that matters; color saturation and color accuracy do as well. On the X11L these are very good thanks to the new Super QLED quantum dots (SQD). The addition of a newly applied filter delivered excellent coverage of the P3 color gamut and the ultra-wide BT.2020. Although it doesn’t reach the advertised 100% of BT.2020, values around 89–90% can be called excellent. Colors are not far off those of RGB Mini-LED panels. We can even say they’re more stable because they use a less demanding algorithm than the one RGB screens often have to deal with.

We tested the LG G6 in the best factory mode for color fidelity, which is FILMMAKER MODE. For our test unit, this mode was fairly well-tuned right out of the box. In SDR content, the only thing we could nitpick was the white balance, which leaned towards warmer tones. As a result, the image could sometimes appear slightly yellowed; however, overall, it wasn't a bothersome issue. The G6 performed a bit worse with HDR content. There, we noticed too much blue component in the white balance. This caused the image to take on cooler shades, resulting in quite noticeable errors. As can be seen in our ColorChecker chart, colors were indeed shifting towards these cooler registers. Nevertheless, for factory settings, the television displayed a completely decent level. However, we know that OLED screens – especially those from LG – respond wonderfully to professional calibration, which is why we immediately proceeded with it.

When you enable the supposedly best Filmmaker Mode, you expect a one-to-one image of what the director saw. On the X11L it's pretty good, but the mode has obvious flaws that our measurements immediately exposed. Let's start with SDR. Both the white balance and the gamma are simply misaligned here. The whites have too much blue and red, giving a faint pink tint. That also hurt the gamma, which instead of holding the cinematic 2.4 runs closer to 2.2. What did that result in? The whole image ends up pushed and artificially brightened. The worst is saved for last: the HDR measurements. Apart from that slight white balance drift, the X11L fails on the brightness management curve called the EOTF. What we saw in the measurements instantly explains what we noticed earlier in the films. The image is unnaturally bright because the curve is massively overshot above the reference. The TV simply and ruthlessly lifts the dark parts of the image to create a "wow" effect, completely ignoring the director's intent.

After conducting a professional calibration, we gained complete control over the panel, and we were able to adjust all parameters to nearly zero. We managed to perfectly tune the white balance, which made the factory-cool and warm tints disappear from the screen. The effects are clearly evident in the ColorChecker test – the average color reproduction errors dropped below the critical value of 1-2. And what does that mean? PERFECT colors, with no distortion whatsoever! However, from a reviewer's obligation, we must comment on how the LG G6 autonomously manipulates brightness, for which the EOTF curve is responsible. When we look at the standard synthetic graph, it may seem that the line is quite straight. The situation changes, however, when we turn on the measurement filter, which shows how the television interprets brightness in real, moving film scenes (EOTF in MOVIES). At that point, it becomes clear that some of the smallest fragments on the screen are slightly over-brightened by the algorithm. Of course, for the average viewer, such a deviation will be practically unnoticeable, but in the test of such an expensive screen, it is worth noting – especially since we are talking about a model that has huge aspirations to be the best television of the year.

After a professional calibration we were above all able to fully tame the SDR signal. The X11L responded perfectly to our adjustments. We were able to completely straighten the white balance, eliminate that pink tint, and set gamma to a stable 2.4. After that treatment the picture finally became consistent with the director’s intent, natural and free of artificial boosts. For HDR we also managed to make minor corrections, but the TV’s biggest flaw remained unchanged. I’m talking, of course, about how the X11L manages its brightness and how badly it overshoots the EOTF curve. Unfortunately, TCL provides virtually no tools to manipulate this parameter. Even during professional calibration the software offers no way to tame that curve, so the TV will always tend to brighten the image in HDR.

No matter what one may say about the G6's problems with near-black signal, it must be fairly acknowledged that it handles highly compressed material and lower resolution content brilliantly. All unwanted, ugly tonal transitions are effectively reduced here by the “Smooth Gradation” feature. On the “Low” setting, the algorithm operates flawlessly – effectively masking the artifacts resulting from strong compression, without destroying the sharpness and details in the frame. Higher levels of this feature indeed smooth the image even more, but they start to blur the real texture elements of objects, which is why we recommend keeping this slider at a low level. As for the 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 does not lag behind the world's best.

Like in the C8L model we tested earlier, TCL has delivered a substantial upgrade in its flagship X series in this area. It's all thanks to the MediaTek Pentonic 800 processor used in this model. Thanks to it, features that smooth tonal transitions or even upscale content to higher resolutions finally look the way they should. The biggest Achilles' heel of previous TCL models has finally been addressed. The processor excels at digital processing, and in this respect the TV no longer lags behind flagship models from Korea or even the most refined ones from Japan.

The LG G6 is an OLED television, so in the category of motion fluidity, it traditionally deserves the highest ratings. The television supports a very high refresh rate of up to 165 Hz in 4K resolution, but most importantly – you will not see any signs of blurring on the screen. The response time of the panel is incredibly fast, ensuring that dynamic images remain perfectly sharp.

In terms of specs, the X11L can impress: it supports refresh rates up to 144 Hz at 4K, and at Full HD it can be pushed to 288 Hz. But from a real-world perspective, we were most interested in how the screen handles 120 Hz. After all, modern hardware is limited to that rate, led by current-generation consoles. How does it perform in practice? Although it uses a VA panel, the screen doesn't exhibit heavy ghosting. With very fast-moving objects you can notice a slight smear, but it's subtle enough that it doesn't stand out when gaming or watching sports. The motion smoothing feature called "Motion Clarity" is also very helpful; it lets you adjust motion smoothness to your liking. Recommended settings are shown in the photo.

LG G6 is a true monster for gamers and one of the best-equipped TVs in this regard on the market. The manufacturer did not seek compromises and equipped this model with as many as four full HDMI 2.1 ports with a maximum bandwidth of 48 Gbps. This means that no matter which port you plug your PlayStation 5, Xbox Series X, or powerful PC into, you will extract the absolute maximum from them.

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

For gamers the X11L is simply a superb screen. TCL has already gotten us used to the fact that its products deliver practically every feature available on the market, and it's exactly the same with the flagship from the X series. Thanks to the new processor, the X11L offers four HDMI 2.1 ports with the full 48 Gbps bandwidth. Naturally, the 2.1 standard brings a set of extremely useful options, such as Auto Low Latency Mode (ALLM) and VRR frame synchronization, working across the full refresh range up to 288 Hz. All of these features can be conveniently controlled from a dedicated Game Bar. Interestingly, its appearance can be customized to your taste, with three ready-made themes referencing Nintendo, PlayStation, and Xbox consoles. And speaking of Xbox: Dolby Vision Gaming also works on the X11L without any problems.

When gaming in the standard HDR10 format, however, you should be aware of the specific tuning of the brightness curve, which can cause problems during initial setup. Although the TV supports HGiG, configuring everything through the PlayStation or Xbox system menus can be tricky. The screen's algorithms tend to artificially brighten the test checkerboard pattern, making it really hard to hit the correct white clipping point by eye. For HDR10 content to look right, we recommend manually setting the brightness in the console menu to around 2500–3000 nits.