TCL C6K vs Xiaomi S Pro 2026

TCL C6K is a moderately bright TV that can showcase its full potential under the best cinematic conditions – the maximum brightness is around 600 nits. In scenes with large, intense light sources, the HDR effect can be really satisfying, providing a sense of cinematic brilliance. However, it should be noted that when managing the backlighting zones, there are situations where some elements become dimmed and sometimes can even become barely visible. It is clear that there is a lack of proper algorithm optimization here, although looking at the technical parameters in this price range, the design itself performs very well.

When it comes to HDR quality, the Xiaomi S Pro 2026 is undoubtedly a really bright TV. On our synthetic measurement charts, we were able to generate a peak brightness of around 1400 nits. This is not only a very good result but even spectacular, considering the price of this model. However, as we always repeat, for our editorial team, measurements and experiences from the content we watch every day—movies and series—are more important. So let's analyze how Xiaomi handles film material. Unfortunately, the result is somewhat mixed. When very bright scenes appear on the screen, the S Pro 2026 truly shows its full potential and can achieve real brightness of 800-1000 nits on bright elements. Moreover, even smaller objects can "burn" the eyes— in scenes from the movie Sicario 2, small metallic elements of the helicopter were really bright. The problem is this—and here the story comes full circle back to our assessment of contrast—that in such scenes, we cannot count on absolutely cinematic black. In our opinion, this compromise is too significant; high visibility of details in bright areas should not come at the expense of such a substantial boost in black levels. And even though the HDR effect itself can be striking here, it is important to remember that when very difficult, mixed scenes appear on the screen, we may feel a slight disappointment. Exactly the one we mentioned in the previous paragraph regarding dimming issues in HDR mode. On a positive note, it is worth adding that the S Pro 2026 is equipped with an additional PFS filter (which works similarly to a QLED layer), effectively broadening the color palette coverage. As a result, measurements showed a DCI-P3 color gamut coverage of up to 94%. This gives us the confidence that in most colorful scenes, the image will look rich and appropriately saturated.

This year's TCL televisions feature a Filmmaker mode, and it must be admitted that it is definitely the best choice straight out of the box. This is the mode we recommend for everyday watching of movies and series. Unfortunately, as is often the case, the best doesn't mean perfect. In the case of SDR content, the image was too warm because the red was strongly emphasized in the white balance. On the other hand, with HDR content, we had the opposite impression – the image became cooler than it should have been due to excess blue. Additionally, the brightness characteristic sometimes led to highlights being blown out. In practice, this resulted in quite noticeable color test inaccuracies that are hard to accept in a mode advertised as "by the creators."

Of course, we conducted all our measurements in "Film" mode, which is usually the best and most accurate choice you get straight out of the box. And we have to say it bluntly: even though this is the best mode, it is still very far from ideal. First of all, the television has a clear tendency to give the image a cool, bluish tint – this is due to a poorly set white balance. Additionally, there is a problem with how the S Pro 2026 manages its brightness right after being taken out of the box, which results in an overly bright image. These two flaws contribute to really huge colorimetric errors (Delta E). In HDR content, they were able to exceed our expected error scale of "10" (meaning values close to 20). For reference – the threshold of perceivable error by the human eye is a Delta E value of around 3. Results at the level of 20 mean that the image significantly deviates from what the director intended.

Thanks to the white balance correction, it was possible to significantly reduce the C6K's tendency to distort colors, which resulted in a very good final outcome. After calibration, we will no longer observe the effect of excessive warming of scenes in SDR or overly cooling the image in HDR. However, it is worth taking a closer look at the brightness characteristics. In SDR content, there are few complaints – the image looks really good, especially in older movies, TV shows, or materials from YouTube. This is much worse for HDR content. Analysis of the EOTF curve suggests that everything is fine, but in practice (EOTF in films), the limitations of the construction become apparent. The TV tends to overly brighten the smallest parts of the frame, and in other situations, it can dim the entire scene too much. The effect of calibration is therefore evident, and in terms of color, the C6K has gained quite a lot, but certain limitations arising from local dimming and, in fact, its management by the C6K simply cannot be overcome.

So how does the S Pro 2026 perform after our calibration treatment? We must admit that after calibration, the television becomes a really pleasant device for watching everyday content. As you can see in the graphs, we managed to bring both white balance and gamma values to nearly perfection in HD (SDR) material. Most importantly, the colorimetric errors have become practically invisible to the human eye. In this scenario, the S Pro 2026 is simply a great television that, after professional calibration, can provide a lot of enjoyment while watching. However, it is worth noting clearly – our efforts helped little in 4K HDR mode. Despite calibration, the television still interprets the image rather strongly "in its own way," which is clearly seen in the measurement of the EOTF curve (luminance tracking). It's a bit of a shame, because this shows that the problem lies not in the panel itself, but in the software. Underdeveloped image management algorithms in HDR content can, unfortunately, disqualify this television for many more discerning users.

The TCL C6K performs quite well in terms of scaling. Lower quality materials look acceptable, and the lack of overscan issues means that the image is displayed in full, without cropping. However, one cannot expect miracles – content of very low quality will not gain new life here, as the image processor has its limitations. On thin lines or details, the characteristic tearing is visible, which reveals the absence of advanced image enhancement algorithms. It is also a pity that the C6K lacks the feature for smoothing tonal transitions – in older films or video materials, color banding can be noticeable and may be bothersome during long viewing sessions.

Let's start with the issue we addressed in the previous paragraph: can a TV even fix the problem of poor tonal transitions in dark scenes? Theoretically, yes – in the menu, we find a feature with the promising name "Color Contour Removal." Well, "theoretically." Unfortunately, in practice, this setting – regardless of which of the three power levels is selected – yielded absolutely no real results. So we have a feature that, in practice, only exists in the menu. Moving on to the quality of upscaling (scaling the image from a lower resolution to 4K), unfortunately, we have more bad news for you. The S Pro 2026 handles this task very poorly. Interestingly, the phenomenon of "overscan" (slight image cropping) is not a big issue here. The problem is that the TV simply displays a very raw, unprocessed image. Its attempt to upscale the signal to a higher resolution looks simply poor and lacks any "smart" enhancement. There is no denying it – the whole digital image processing is the true Achilles' heel of this model.

TCL C6K features a 144 Hz panel, which is a significant advantage in this price range. This is an important step forward compared to the previous model C655 PRO, which offered only 60 Hz at 4K. The difference is especially noticeable when watching sports or playing games – the ball, athletes, or fast action in a game are displayed more clearly and without losing details. An interesting fact is also the ability of the panel to operate at 240 Hz, which the manufacturer does not mention in official materials. We will return to this topic when discussing the game mode for PC.

TCL also added a feature for movie watchers: "Motion Clarity," which allows you to adjust the image to your preferences using two simple sliders. You can keep the movie frame visible or opt for a very smooth, almost theatrical effect. This way, everyone can find settings tailored to their taste.

On paper, the specification of the S Pro 2026 looks impressive. The television is equipped with a native 144 Hz panel, capable of displaying images up to 288 Hz in a dedicated gaming mode. These are amazing results, but what interested us the most, in the context of everyday use, was how the television handles motion blur and how the image looks at 120 Hz. After all, this is the frequency used today by consoles like PlayStation 5, Xbox Series X/S, and it is desired by sports fans. Generally speaking, the panel "holds up." The matrix is fast enough to meet these challenges, and objects displayed at native 120Hz fluidity are shown correctly. As for the software, the television is equipped with a motion smoothing system, but with a key caveat – it only works for input signals up to 60 Hz. This means it is mainly suitable for classic television, movies, and series. Thanks to this, we can adjust the fluidity of the image to our own preferences – from a very smooth, "theatrical" approach to setting the slider to "zero" and maintaining a fully cinematic character.

The TCL C6K is a TV that can confidently be called equipment designed for gamers. Here we have 4K at 144 Hz, VRR support, automatic game mode (ALLM), and Dolby Vision Gaming. Additionally, there's a practical Game Bar, a panel with the most important settings readily available – useful when we want to quickly change something during gameplay (e.g., screen aspect ratio: Yes, that’s possible!). The wide VRR range, reaching up to 240 Hz, deserves attention. However, this is mainly an option for PC gamers who drop below the native 4K resolution. Then the TV can spread its wings and show additional smoothness, especially in fast-paced e-sports titles. In the case of consoles, we stick to the classic limit of 120 Hz, but the possibilities are still quite broad. The only drawback is a slight ghosting that can sometimes be seen in dynamic scenes. Other than that, the C6K offers everything gamers expect from a TV.

For gamers, the Xiaomi S Pro 2026 is, on paper, an almost ideal proposition. It is equipped with two HDMI 2.1 ports, allowing us to unlock (although these options are somewhat hidden in the menu) the full suite of features: ALLM, VRR, and, crucially, the ability to work in 4K at 144 Hz. This last feature should particularly please owners of powerful PCs. The TV also has something akin to a gaming panel – and while it’s hard to call it a full-fledged "Game Bar," it does its job by displaying key information. It’s just a shame that in its default form, it covers a relatively large part of the screen.

However, our biggest issue with this model concerns how the S Pro 2026 handles gaming in HDR mode. To put it bluntly: it doesn’t handle it well. Due to the poorly implemented HGiG function (the HDR tone mapping standard for games), during the initial HDR calibration on the console, it’s very easy to "blow out" the image. If someone is unaware of this software flaw and follows the on-screen instructions, they will simply set the image incorrectly, with burnt-out details in bright areas. Another major problem is the Dolby Vision mode for gaming. While it does work, it generates such a high input lag that it becomes noticeable in dynamic titles. (All our latency measurements can be checked in the paragraph below). In summary: generally, it’s a really good screen for gamers, but with one small caveat. We would rather avoid HDR mode on it – unless we decide to manually adjust the brightness bar on the console "by eye," completely ignoring the instructions from the console's pictogram.