TCL C75B vs XIAOMI S Mini 2026 (55"-75") 60Hz

During our brightness test, the TCL C75B "spat out" around 380 nits of brightness. We recorded similar results while watching most of the films we tested. These can be considered average – the TV performs decently in this segment, but around 400 nits is definitely too low to fully experience the magic of HDR effects. Of course, such results are better than those of budget models, which can achieve nearly half the brightness values. However, for HDR enthusiasts seeking stronger lighting effects and greater realism, the C75B may prove insufficient. On the plus side, it's worth mentioning the coverage of the DCI-P3 colour gamut at 95%. This is a very good result that easily suffices to enjoy a wide range of colours in content available on popular streaming platforms. Vivid and rich colours are definitely a strong point of this model.

When it comes to HDR, the Xiaomi S Mini 2026 performs really well, especially given the segment this model sits in. The TV can reach around 1000 nits of brightness without much difficulty, so in bright scenes it can deliver a very pronounced HDR effect. The sun, highlights or very brightly lit parts of the picture can be intensely bright and at times really hit you with their intensity. It’s a bit different in dark scenes, though. Very small light sources surrounded by black are rendered at much lower brightness, so they lack the pinpoint intensity seen on the best TVs. That’s not unusual for a Mini LED. The local dimming algorithm reduces the backlight in those cases to preserve as deep a black as possible, which in such scenes matters more than a few extra nits.

HDR colours

Colour reproduction also fares well. Xiaomi markets the S Mini 2026 as a QLED TV, although the solution used here is in practice based on a PFS phosphor. What matters is the result, and that is pretty good. Measured DCI-P3 gamut coverage was around 94%, while in the much wider BT.2020 colour space it was about 74%. That means the TV can show most of the colours used in HDR movies with suitably high saturation. Its limitations are most noticeable with very intense shades of green, where the colour range begins to run out.

TCL C75B offers various picture modes, but in our opinion, the best choice is the “Film” mode. Although its settings are quite decent, the TV struggles with certain colour reproduction issues. In tests, we noticed that the image had a noticeably pinkish hue compared to what could be considered correct. This effect was particularly evident in skin tones, which appeared unnaturally flushed. The main culprit of this phenomenon turned out to be the white balance, characterised by an excess of blue and red in both HD and 4K HDR materials.

An additional problem was the way brightness was reproduced. The gamma, which is responsible for the visibility of details in darker materials, was definitely boosted, causing details in the darkest parts of the screen to be invisible, disappearing into complete black (e.g., the bottom part of the screen in the comparison image - the area around the actress's ear). The situation was similar on the EOTF curve, which was below the correct value, suggesting that a similar issue may be encountered in 4K HDR content.

Thanks to our experience and the appropriate tools, we decided to take matters into our own hands and check how much could be extracted from this model after professional calibration. The details are described in the next section.

We tested the Xiaomi S Mini 2026 (55–75 inch models) in Film mode, which compared with the other presets offered the most accurate colours. That did not mean the image was correctly set up straight away. In our unit the white balance was noticeably shifted toward warmer tones. There was too little blue and too much red, giving whites and greys a slightly warm cast. The TV also tended to brighten darker parts of the image too much. This was due to the gamma, which instead of staying around 2.4 fell in places to about 2.0. That made shadow detail more visible, but the image lost some depth. So the factory settings weren't bad, but they still needed some adjustment to reproduce the picture accurately.

After calibration, TCL C75B has clearly improved when it comes to colour reproduction. Although the TV doesn't offer too many options for adjusting the white balance, we managed to improve its settings quite a bit. As a result, the image is no longer overly pink, and the colours now look much more natural and harmonious.

The gamma jump that was previously an issue hasn't completely disappeared, but we were able to significantly reduce it. This has made details in dark scenes more visible – both in HD and 4K HDR content.

Unfortunately, the lack of local dimming is still noticeable. The 'blooming black' effect remains, but that's a limitation of the display itself. Still, the colours post-calibration look significantly better, and the image is much more pleasant to watch.

Surprisingly, the Xiaomi S Mini 2026 responds quite well to calibration. After our adjustments we were able to noticeably improve the white balance and the picture stopped leaning toward overly warm tones. In SDR material the result is really good, with the TV able to reproduce such content very accurately and hard to fault for colour reproduction. We made similar adjustments in HDR, although not everything could be corrected there. Colours look better than on the factory settings, but the TV still tends to display the picture a little brighter than it should. You can see this from the EOTF curve, which sits above the reference. In practice this means some HDR scenes are brighter than the creators intended. It's a quirk of this TV and we can't do anything about it.

TCL C75B has a feature for smoothing tonal transitions, but unfortunately, we cannot praise it. Regardless of the selected level – low or high – tonal transitions in older materials remained visible, as if the feature wasn’t working at all. It’s hard to say anything positive about it, as in practice it seems completely useless.

Image scaling is better. The TV handles it quite decently, although on thinner elements, like branches in the background, you can see slight jaggedness. However, this is not something that significantly hinders everyday viewing.

Unfortunately, a bigger problem turned out to be overscan, or cropping of the image edges. In our tests, it happened that news ticker or other elements close to the edge of the screen were cut off. This is definitely something to pay attention to, especially if we use the TV for watching news programs or content with text on the screen.

The MT5896 processor handles digital image processing in the Xiaomi S Mini 2026. Unfortunately, in this respect the TV is fairly average. Low-resolution content isn't upscaled very well, and its limitations become obvious on a large screen. The picture looks quite digital, and the TV can't pull out many extra details. You also can't turn off overscan for low-resolution content. The handling of posterisation smoothing is even worse. On the smaller models there's not even a separate setting to reduce the visible banding between similar shades. So if those imperfections are already present in the source material, Xiaomi effectively doesn't mask them.

TCL C75B definitely has something to offer gamers. The television is equipped with a panel that can display images with a refresh rate of 144 Hz in 4K, and even 240 Hz in Full HD. These are really impressive results, especially for a model from the budget range.

On top of that, there are features for improving smoothness and reducing motion blur in films. The "Motion" option allows for precise adjustment of the effect on a 10-point scale, providing significant personalisation possibilities – everyone can set the smoothness to their liking.

The smaller variants of the Xiaomi S Mini 2026 use a 60 Hz panel, and that's their biggest limitation when it comes to motion. For films and TV series this isn't yet a major problem, because the TV has a classic motion interpolator for 24/30 fps material. So you can reduce the characteristic judder and adjust motion to your own preferences. Sports and other 50/60 Hz material fare worse, because there’s no additional feature to improve smoothness. In such content we’re therefore limited by the panel itself.

In terms of motion blur the TV performs fairly typically for a VA panel. The most trailing is visible behind objects moving against a dark background, while in brighter scenes the effect is noticeably smaller. It’s not at a level that completely ruins the perception of motion, but in dynamic scenes you can see that the panel isn’t one of the fastest.

TCL C75B is undoubtedly a television designed with gamers in mind. It has almost everything needed for even the most demanding console users. With the implementation of full bandwidth HDMI 2.1, the TV supports features like ALLM (automatic low latency mode) and VRR (variable refresh rate) – operating within the full capabilities of the TV, up to 240 Hz in Full HD resolution.

Additionally, the television supports advanced HDR technologies, including Dolby Vision and HGiG, which allows for even better detailing in HDR-optimised games. C75B is also equipped with a very convenient interface for gamers in the form of Game Bar, where you can check all key parameters such as refresh rate, input lag, or picture settings – all just a click away.

In one sentence: C75B is a great choice for gamers, offering a wide range of features that fully enable enjoyment of the capabilities of modern consoles and games.

In the larger sizes the Xiaomi S Mini 2026 becomes a far more interesting option for gamers. The panel runs natively at up to 144 Hz, so when you connect a PC you can use the high refresh rate even at 4K. At lower resolutions the TV can go even further, reaching up to 288 Hz. It also offers ALLM, automatic switching to Game Mode, and a Game Bar that keeps the most important settings within easy reach. Of course, the TV has two full-bandwidth HDMI 2.1 ports. So in terms of smoothness the difference compared with the 55–75 inch versions is substantial and particularly easy to notice when using a PC or console. However, not everything works perfectly. As with the smaller variants, we have reservations about the HGiG implementation. The HDR setup screens on the PS5 and Xbox don't precisely reflect the TV's actual capabilities, so if you set the console according to those prompts the brightest parts of the image can be blown out and lose some detail.