Xiaomi S Mini 2025 vs Samsung S90H (WOLED)

Since the Xiaomi S MiniLED boasts an impressive number of 308 dimming zones, it is time to test how it performs in HDR tests. Starting with luminance, or the ability to display bright scenes, the television achieved nearly 1000 nits of brightness – a result that can be considered outstanding in this class. Do these figures, however, translate to real experiences in film scenes? In the case of less demanding shots, such as those from the film The Meg, the television indeed showed excellent results, reaching up to 900 nits. Such values are impressive and can truly convey the power of HDR effects.

Unfortunately, much like with contrast, it wasn't without issues. When smaller, brighter elements appear on the screen – as in the challenging scenes from Sicario 2 – the aggressive operation of the dimming zones spoils the entire effect. Brightness in these moments drops to just 100 nits. This is definitely too little to capture the full magic of HDR. Instead of a dynamic and detailed image, the viewer receives a muted, almost flat impression, which takes away all the enjoyment from the viewing experience.

In summary, if we are looking for a television with high brightness for watching films during the day, the Xiaomi S MiniLED will easily fulfill that task. However, its inability to precisely manage the dimming zones means that watching films in the evening, especially in demanding HDR scenes, can be more frustrating than satisfying.

Samsung S90H in the WOLED variant is still an exceptionally bright TV for its price bracket, although compared with the QD-OLED version it is slightly dimmer. The difference is not as significant as in last year’s F series, where the gap could reach as much as 500 nits. Here the parameters of both panels are very similar, and differences in peak brightness are only in the order of 100–150 nits. In small-area measurements the S90H on the WOLED panel easily reaches levels close to 1500 nits. Such a reserve of power allows HDR dynamics to be reproduced phenomenally; all highlights, light reflections and explosions have the necessary punch, exactly as the creators intended in the editing studio. As with most OLED displays, when a very bright scene fills the whole screen protection systems activate and brightness naturally falls to around 700 nits. It is worth emphasising that this is still an excellent result on the market. Often noticeably better than many Mini LED screens in the same segment.

Colour gamut coverage

The biggest difference between the two S90H variants lies in colour reproduction and saturation. This results directly from the different construction of the WOLED panel, which uses an additional white subpixel. As a consequence, colours at very high brightness do not reach the same intense saturation, and the volume of the wide gamut is somewhat more limited than in QD-OLED. That does not change the fact that in everyday use these differences will be hard for most viewers to spot. The DCI-P3 space we measured reaches nearly 99% on the WOLED panel, which means that in the vast majority of real film scenes both variants will present an almost identical picture. The true distance only reveals itself in rarer, exceptionally demanding productions that use the ultra-wide BT.2020 gamut. Due to the specifics of the WOLED panel’s construction, coverage of that standard is about 15% lower compared with the S90HAT with a QD-OLED panel, so the brightest, heavily lit colours in HDR may appear slightly less vivid.

Xiaomi, like many manufacturers, offers a wide range of picture modes. On the S MiniLED, we can find both IMAX Enhanced and Filmmaker. Our tests were conducted in Filmmaker mode, which theoretically aims to reflect a reference image, but the reality turned out to be somewhat different.

Let's start with the test of SDR content. Here, the television had quite a few issues, especially with white balance. The clearly visible dominance of red made the image look too warm, with all colours taking on a reddish hue. This was particularly noticeable in a comparative scene from the film Star Wars. The brightness characteristics (gamma) also left much to be desired – instead of a smooth transition, we had a real "rollercoaster," with a visible excessive brightening of the screen.

In 4K content, the situation improved significantly. The white balance, although still not perfect, was much more balanced, with a slight dominance of red and blue, but without excessive impact on the overall perception. The EOTF curve (responsible for brightness in HDR) showed some brightening in the brightest parts of the image, which was noticeable, for example, in the test scene from the film Pan that we described earlier. These brightening effects may disturb the precision of the image, but in 4K, the overall effect was much more acceptable than in SDR.

Although Xiaomi S MiniLED can pleasantly surprise with 4K content, its factory settings in SDR require solid adjustments, especially regarding white balance and brightness. This is definitely a television that would benefit from calibration.

In Filmmaker mode, which we strongly recommend switching on straight out of the box, the S90H offers very good factory colour tuning. Colours are natural and faithful to the creators' intent, without the irritating oversaturation found in more aggressive presets. However, as is often the case without full calibration, no two units are identical. In our test the white balance was slightly lacking in blue, causing the image to lean a little towards warmer, yellowish tones. This was most noticeable in bright scenes, such as the snowy sequences from Star Wars. Additionally, the gamma curve was slightly low at 2.2, which produced a minor lift in shadow detail. In HDR mode the tuning was somewhat better, showing only a slight undersaturation in the red region.

Xiaomi S MiniLED 2025 is a television that gains a completely new life after calibration. The results are truly outstanding and show how much potential is in this model.

In SDR mode, the white balance is nearly perfectly aligned. The errors are so minimal that in many cases they can be considered negligible. This is confirmed by the results of the Colour Checker palette, where the errors did not exceed a value of 2 ΔE – this is really a rare result. Gamma also performs very well, although at the beginning of the graph there are slight brightenings in the darkest elements. However, this is a minor exception that does not significantly affect the perception of the image.

In 4K HDR materials, the calibration also brought visible improvements, particularly in the white balance. The image looks natural and cohesive. However, the characteristic of brightness remains a problem. EOTF analysis in film materials shows that the television tends to over-brighten or under-darken the smallest elements on the screen. This is a result of limitations in the dimming algorithms we discussed earlier with HDR and contrast testing. Unfortunately, this is a technical characteristic of this model that cannot be completely eliminated.

Despite this minor flaw, the calibration allowed for maximising the capabilities of this television. The image now looks phenomenal, and its quality impresses in every type of material. Xiaomi S MiniLED 2025 shows that with the right settings, it can compete with more expensive models.

After a full calibration it’s fair to say the S90H in WOLED guise looks almost perfect. In SDR mode colour inaccuracies drop to ultra-low levels and Delta E values very rarely exceed 2. That’s a phenomenal result, so if you care about perfectly faithful colour reproduction it’s definitely worth considering calibration. The calibrated HDR mode also performs very well, with the white balance stabilised and earlier deviations eliminated. After professional fine-tuning it’s really hard to find anything to criticise, because the TV delivers an image with almost reference-level naturalness and three-dimensionality. The slightly lower score in this category compared with the QD-OLED variant is solely due to the aforementioned limitation in saturation in extremely bright scenes; the tuning options and colour fidelity themselves are at the highest level.

When it comes to tonal transitions in lower quality materials, such as YouTube or television, the Xiaomi S MiniLED is equipped with a feature called "Colour Contour Removal." At the "low" setting, it performs quite well, although its effectiveness can be inconsistent. Sometimes it seems as though the television is struggling to smoothen, which creates a certain dissonance. On the positive side, we did not notice any visible side effects, although due to the instability of this feature, one could suspect that unexpected issues may arise in certain situations.

Image scaling also performs moderately. There is some slight jaggedness, particularly on thin elements like branches, and subtitles can appear slightly jagged. While this may not be very bothersome, a more discerning eye will certainly pick up on these shortcomings. Overall, most users should be satisfied with the quality of scaling and smoothing, but the television will not satisfy those who expect perfection in every frame of the image.

In terms of posterisation reduction itself, Samsung has kept the solutions known from last year’s models. The dedicated gradient-smoothing function performs quite well and can effectively mask unwanted tonal banding, which is useful on a WOLED panel that is slightly more prone to banding. However, you should be aware of its aggressive behaviour. This mechanism, alongside the artefacts themselves, can clean up fine film grain and gently soften detail. Ultimately it is a matter of compromise, but if you want an absolutely faithful reproduction, it is safer to leave this option off.

Similarly, in the area of scaling it is difficult to call this a breakthrough. The S90H uses the same NQ4 Gen3 processor as its predecessor, so the upscaling quality was almost identical. The chip sharpens lower-resolution material very well, extracting a satisfying level of detail. Samsung still has not dealt with the longstanding overscan issue, though. With some older recordings or archive footage the edges of the image can be slightly cropped. It’s a minor flaw, but it’s a pity the manufacturer still hasn’t eliminated it.

Xiaomi S MiniLED 2025 is equipped with a panel featuring a refresh rate of 4K@120Hz (1080p@240Hz), which provides sufficient smoothness for both watching dynamic sports broadcasts and playing the latest games. This level of refresh rate makes the image appear fluid, even in the most intense scenes. Additionally, the television offers a “Motion Smoothing” feature that allows you to adjust the way the image is displayed in films. You can choose a more frame-like effect, typical of the cinematic experience, or a smoother one, reminiscent of the so-called “theatrical effect.” This way, every user can tailor the settings to their preferences and enjoy smooth images in their favourite content.

In terms of motion handling, the S90H is simply excellent. This year's panel offers a boosted refresh rate of up to 165 Hz, though in practice the benefit will mainly be for gamers connecting a high-end PC. For films, series or sports broadcasts such a high refresh rate makes no difference and the picture looks exactly the same as at the standard 120 Hz. Regardless of the source, however, the OLED panel's lightning-fast response time does its job, so motion is clean and the ghosting or smearing familiar from LCD screens simply does not occur here.

Xiaomi S MiniLED 2025 is a television that has a lot to offer gamers. With two HDMI ports boasting 48 Gbps bandwidth, we can easily connect modern consoles or PCs, utilising their full potential. Additionally, the ALLM feature automatically switches the TV to low-latency mode – something we will appreciate during dynamic games without annoying lags. Regardless of what we connect, it functions smoothly, and the television handles various resolutions exceptionally well. There is also the GameBar, which may not look as impressive as the "bars" from the competition, but makes up for it with practicality. It is a simple settings panel that allows us to quickly change the most important options or check statistics – an ideal solution when time is of the essence.

However, we must admit that operating the television itself – or rather finding the gaming features within it – posed a significant challenge for us. We approached the testing of the Xiaomi S MiniLED 2025 several times to locate all the necessary options. The hidden menu allowed us to discover the "GameBoost" feature, which enables switching the television to 240 Hz mode, activating VRR, and allows for enabling picture in HGIG mode.

In summary, the Xiaomi S MiniLED 2025 is a television that definitely deserves praise in the gaming hardware category. Its rich set of features – 240 Hz mode, VRR, HGIG, and "GameBoost" – provides an exceptional gaming experience. Unfortunately, the intuitiveness of the menu itself leaves much to be desired and may pose a challenge for the average user.

Players should feel at home with the S90H, because Samsung has left few reasons to complain in that respect. The TV has four HDMI 2.1 ports, each of which supports VRR, ALLM and high refresh rates. There’s also the Game Bar, a handy menu that lets you quickly check key parameters and change settings without leaving the game. Importantly, Samsung has also improved HGiG mode. In last year’s models it could cause problems when used with a console, but on the S90H it now works as it should. What really stands out against the competition is the Game Motion Plus feature. It’s a special motion smoothing mode for games that works best with titles running at 30 or 60 fps. Motion becomes noticeably smoother, while latency remains at a reasonable level. In our measurements it was under 50 ms, so gaming is still comfortable. That’s important, because on many TVs enabling a similar smoothing feature causes such a large increase in input lag that controls become noticeably sluggish. Samsung has managed to find a good compromise here. There’s still no Dolby Vision Gaming, but in practice Game Motion Plus may prove to be a much more useful feature.