TCL C655 / C69B 98' vs XIAOMI S Mini 2026 (85"-98") 144Hz

The quality of HDR effect on the TCL C655 / C69B looks quite promising. The average value in the test charts is around 450 nits, which already allows for a hint of the brilliance of light effects and better image dynamics. However, as previously mentioned, this effect can be somewhat subdued by slight differences in bright and dark colours, resulting from the lack of local dimming technology. Nevertheless, the DCI-P3 colour gamut coverage of 94% deserves high praise, and this is made possible by the use of a quantum dot (QLED) panel. As a result, colours are vibrant and well-rendered when watching HDR content.

The larger versions of the Xiaomi S Mini 2026 offer very similar HDR capabilities. Peak brightness reaches around 1000 nits, which for a TV in this price bracket is a very solid result. This is most apparent in bright scenes, where large, strongly lit parts of the picture can look truly impressive. The TV has enough brightness headroom that HDR does not amount to merely a slightly brighter image. Very small points of light appearing on an almost completely black background fare worse. In such cases the local dimming system significantly limits their brightness so as not to illuminate neighbouring parts of the picture and to preserve deep blacks. As a result, small highlights or single lamps do not have the same intensity as in much more expensive models. This, however, is typical behaviour for Mini LED TVs and hard to treat as something unique to Xiaomi.

HDR colours

The issue of colours is similarly close. Although the manufacturer uses the term QLED, the expansion of the colour gamut here is achieved by a PFS phosphor. In our measurements the TV covered around 94% of the DCI-P3 colour space and about 74% of the much more demanding BT.2020. In practice this delivers well-saturated colours in most HDR material and it is hard to point to any obvious shortcomings. Limitations appear mainly with the most saturated shades of green, which the TV is no longer able to reproduce in full.

The TCL C655 / C69B television offers a film mode that has been tested for colour reproduction quality. Although this mode is called film mode, unfortunately, it has many errors that the director would certainly not want to see when recording their work. Starting with image analysis, it's worth examining the white balance – both in HD and 4K HDR content, the white balance has significant errors. In both cases, the red colour dominates, making the colours too warm, and the overall image takes on a pink or yellow tint. The Colour Checker test confirms these errors – the colour samples stray into incorrect shades, affecting the overall colour fidelity. A minor issue is the brightness characteristics. However, this too is not without flaws. The gamma graph shows a strong spike at the beginning, which can cause the image to be excessively brightened, and the EOTF curve responsible for brightness in 4K HDR materials also has significant variations – it is evident how the television tries to maintain the appropriate brightness, but it does not always manage to do so effectively.

In the larger versions of the Xiaomi S Mini 2026 Film mode performs best, although the factory settings here are not without faults. In SDR the white balance was noticeably warm due to an excess of red. In HDR it was the opposite: there was too much blue and not enough red, which made the image cooler. Moreover, both the gamma response in SDR and the EOTF curve in HDR were slightly above the reference values. In practice this produced a slightly brighter image, particularly in the mid-tones. It was not a major fault, but with more demanding material you could notice that the image was not reproduced entirely as the creators intended.

After calibrating the television's movie mode TCL C655 / C69B , the white balance has been adjusted, and the colours are displayed as they should be – which is confirmed only by slight deviations in the Colour Checker test. The gamma is really correct, which means the television shouldn't have problems with brightness in low-resolution materials. Unfortunately, a similar EOTF characteristic is still visible, which is a natural phenomenon in televisions that do not have local dimming – they simply struggle to "shine" stronger in a given section of the screen. Despite this design limitation, which cannot be bypassed, we recommend adjustment in the settings, as the overall coloration looks really very good.

After calibration we mainly managed to even out the white balance, so colours look much more natural in both SDR and HDR. We also improved the gamma response, so the SDR picture is no longer unnecessarily brightened and holds closer to the reference values. The only major issue remaining is in HDR. Xiaomi still manages brightness a little too aggressively and renders some scenes brighter than it should. It looks better on larger sizes than on the 55–75 inch models, but the EOTF curve still runs slightly above the reference. In practice HDR is therefore slightly brightened, even though colour reproduction after calibration is already very good.

The TCL C655 / C69B television handles tonal transitions in lower quality materials well. The "Gradual Smoothing" function, at its lowest setting, effectively eliminates visible banding, but at the same time causes a loss of detail, for example, in the texture of objects. The advantage is that it does not interfere with film grain, allowing the image to maintain a natural appearance.

In terms of digital processing, the television adds a considerable amount of artificial sharpness, which may appeal to those who prefer a crisp image. For those who favour a more subtle representation of details, this could be a downside. Another drawback is the rather aggressive overscan – the image gets cropped, leading to the loss of portions at the edges and limiting the field of view.

The larger Xiaomi S Mini 2026 variants also use the MT5896 processor and perform similarly in terms of digital image processing. Upscaling is not one of this model's strengths. Low-resolution content is upscaled to 4K in a fairly basic way, and there is not as effective retrieval of fine detail as in more refined televisions. The 85 and 98 inch versions do include a feature intended to reduce posterisation, but its effectiveness is very limited. After switching it on it is hard to notice any real improvement, so the TV still does little to address visible banding between colours.

Unlike smaller versions, the 98” model stands out with significantly better motion fluidity. Instead of the standard 60 Hz, this colossal screen is equipped with a full-fledged 144 Hz matrix, which opens up entirely new possibilities – both for gamers and movie lovers. Thanks to the full motion smoother, the television provides incredible image fluidity, eliminating motion blur and enhancing the viewing comfort of dynamic scenes. It is worth noting that this technology works across the full refresh range, meaning that there is no need to compromise between fluidity and quality. Additionally, the "Flicker Reduction" function allows you to adjust the fluidity to your own preferences – you can opt for a more cinematic effect with visible frames or an extremely smooth image.

The biggest difference between the various sizes of the Xiaomi S Mini 2026 concerns the panel's refresh rate. The 55 to 75-inch variants use a 60 Hz panel, which in practice results in noticeably less smooth motion than the larger versions. This is most apparent when watching sport, fast-paced scenes or gaming, where the picture is not as smooth and sharp in motion.

The 98-inch TCL C655 / C69B is excellently equipped for gamers. Full HDMI 2.1 ports and a 144 Hz panel allow for gaming in 4K at 120 Hz, providing fluidity and responsiveness that will impress even the most demanding.

The television supports Variable Refresh Rate (VRR), eliminating screen tearing, while the Automatic Low Latency Mode (ALLM) ensures that the game starts immediately without the need for manually switching settings. There is also support for Dolby Vision and HGiG, making the image quality in games even better – details are sharp, colours are natural, and contrast is perfectly balanced.

Additionally, the television offers a dedicated gaming panel that allows for quick adjustment of picture settings without the need to exit the game. It is a device that meets virtually all the requirements of a modern gamer.

Unfortunately, the smaller versions of the Xiaomi S Mini 2026 have a significant limitation for gamers: a 60 Hz panel. In 4K we are therefore limited to 60 fps and cannot fully take advantage of the PS5 or Xbox Series X. It is possible to run 120 Hz, but only after dropping the resolution to 1080p or 1440p. Apart from that, it’s all fairly sensible. The TV supports ALLM and automatically switches to game mode when it detects a console. There is also a Game Bar that lets you quickly check the most important gaming settings. Our biggest reservation concerns HGiG. The HDR calibration screens on the PS5 and Xbox do not match the TV’s actual capabilities. If you set HDR exactly according to them, some of the brightest elements may simply be blown out.