Hisense U7S Pro vs LG OLED G6 (G64LW, G66LS)

Let’s start with the fact that the U7S Pro is an impressively bright TV — in calibrated mode our measurement equipment showed a staggering 2200 nits of peak brightness!

As we know, peak brightness on test patterns is one thing, and actual film scenes are another. Unfortunately, in real video material the backlight output drops noticeably. The TV can still exceed the 1000-nit mark in the most demanding moments — which is still a great result and fits the mastering standards of most HDR films — but the real challenge lies in the aggressively tuned local dimming algorithms. Because of them, small, bright details like stars or the moon in a night sky are noticeably dimmed. The TV tries at all costs to maintain deep black, which is understandable, but unfortunately this comes at the expense of HDR’s dynamic range and brilliance.

The color reproduction is worth praising. The new U7S Pro is a QLED design that provides very wide color gamut coverage. Unlike last year’s model (U7Q Pro), this year’s variant is a true QLED, not a solution based on a PFS filter. As a result, color saturation has increased noticeably, and coverage of the most demanding BT.2020 color space has topped 81%.

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.

We tested the U7S Pro, as we always do, in the best factory-tuned picture mode, Filmmaker Mode. The colors can be judged in two ways. The most disappointing was the profile intended for watching SDR content, i.e. traditional broadcast TV, YouTube, and other less demanding material. The image there was clearly yellowish, which turned out to be a direct consequence of a poorly set white balance. As our charts show, there's a large deficiency in the blue component, which drastically affected the overall color temperature. You can see this clearly on the ColorChecker charts and on the color gamut graphs themselves, where most samples shifted toward yellow. Fortunately, the factory HDR mode performed much better. There, color errors hovered around a Delta E of 3, which is a solid result.

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.

We know, however, that Hisense is capable of much more, as previous generations have shown, so we simply couldn't leave the U7S Pro's factory flaws in everyday content as they were. As always in such cases, we had the TV professionally calibrated. The result? The process brought a massive change. After manually correcting the white balance and filling in the missing blue component, the annoying yellow cast vanished as if it had been wiped away. Whites became naturally clean, and skin tones gained a proper, healthy hue. Importantly, the calibration not only tamed the finicky SDR mode but also squeezed the maximum potential out of the panel, reducing average color reproduction errors to levels almost imperceptible to the human eye. The only thing we still have to fault after the whole process is the nature of Mini-LED backlighting and its specific interaction with the HDR signal. Aggressively tuned local dimming algorithms quite strongly interfere with the EOTF luminance curve. As a result, the backlight doesn't always align with the creator's intent — depending on the scene, the curve can run noticeably above or below the reference, which in places disrupts the ideal dynamics of the HDR picture.

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.

The digital processing of lower-quality signals is top-notch here, thanks to the MediaTek Pentonic 800 processor used in the U7S Pro. Upscaling, the TV's ability to pull lower-resolution content up to 4K, also performs well. We didn't notice any unnatural, sharp contours on screen, and our test image with the model simply looked attractive.

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.

The Hisense U7S Pro uses a panel with a maximum 165 Hz refresh rate at 4K, and in game mode it can even reach 330 Hz at Full HD. However, it's worth remembering that those highest numbers don't matter much in everyday use, because most content still supports at most 120 Hz (for example when playing on a console). Even so, the TV handles motion quite well and performs well for an LCD design.

There's little to fault about the smoothness itself. In the menu you'll find a motion smoothing feature called "Motion Enhancement", which hides two sliders: blur reduction and judder reduction. They allow manual adjustment of the smoother, which works well for both movies and sports, effectively improving the raw TV signal.

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.

If you plan to connect a console or PC to the U7S Pro, you'll be more than happy – this TV is great for gamers. Hisense spared no expense and put in four HDMI 2.1 ports with full 48 Gbps bandwidth. So you won't have to juggle cables, since every port supports the full feature set. There's automatic low-latency mode (ALLM) and VRR, which works across a wide range from 48 Hz up to a cosmic 330 Hz. Of course that 330 Hz is for now a gimmick for owners of powerful PCs, because consoles are capped at 120 Hz anyway, but it's good to have that headroom for the future. The Game Bar is also really useful while gaming. It's a handy in-game menu where, without leaving the TV's main settings, you can quickly change the picture mode, enable a crosshair in the center of the screen, or even switch to an ultra-wide aspect ratio, which PC sim fans will appreciate. The only downside worth knowing about is the incorrect implementation of HGiG in games. The TV ignores the console's instructions for HDR10 output and keeps forcefully altering the image, trying to "improve" it its own way. Because of that, properly configuring HDR in the console menu (where you set brightness using the logo/checkerboard pattern) is a bit more difficult.

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.