Samsung QD-OLED S90D / S94D vs XIAOMI A PRO 2025

In the HDR effect category, the Samsung S90D delivers remarkable performance. On the luminance graph for up to 10% of the window, the television surpasses the 1000 nits mark, which is a notable achievement. However, in the film scenes we tested, these values were slightly lower. In scenes with fullscreen sun glare the brightness drops to about 500 nits, but this is still considered a very good result. It is also worth noting that this model stands out due to its very high colour gamut coverage, thanks to the QD-OLED panel, giving it an edge over televisions with WOLED panels, which cannot achieve such a wide spectrum of colours.

In the HDR category, the Xiaomi A Pro performs poorly overall. Under ideal conditions, it achieves a brightness level of around 250 nits, which is underwhelming. However, many competing models offer similar or even lower brightness levels. Such limited brightness is insufficient to fully showcase the potential of HDR content. In practical terms, the image lacks the depth and intensity expected from high-quality HDR. Instead, the visuals resemble standard dynamic range (SDR), with scenes that should display striking brightness and contrast appearing flat and uninspiring. That said, for its price, the television offers solid DCI-P3 colour gamut coverage at 92%, made possible by its quantum dot (QLED) technology. This ensures vibrant and saturated colours, making it an appealing choice for gamers and movie enthusiasts seeking richer hues and improved colour reproduction compared to standard models.

The Samsung 65" S90D with a QD-OLED panel has been tested in Filmmaker Mode, which the manufacturer has used for years to deliver optimal picture settings. In this mode, the TV offers a very good image, but there are some shortcomings worth noting.

In terms of white balance, viewers may notice a red dominance in HD content, which can make skin tones appear unnatural and create a warm overall scene, potentially affecting immersion. This issue becomes more apparent in scenes where subtle colour differences are important. The same effect can be observed in 4K HDR content, though the red shift is less pronounced. This shift can prevent certain details and colours from being fully realised, diminishing the naturalness of the image.

As for contrast, the gamma performance is decent but still has some issues. The gamma values fall short of the reference level of 2.4, resulting in bright areas of the image appearing washed out and dark areas lacking detail. This limitation can make certain scenes feel less dynamic and impact the depth and richness of the picture. However, the EOTF curve for contrast in 4K HDR content performs well, showing the TV's ability to handle differences in brightness. That said, these values still fall slightly below the ideal range, indicating room for further optimisation.

Overall, the Samsung S90D in Filmmaker Mode offers solid colour reproduction, but some adjustments are needed to fully unlock its potential, particularly with different types of content.

The Xiaomi A Pro 2025 performs best in movie mode for colour reproduction straight out of the box, though it is not without its flaws. An analysis of the white balance shows negative green values, causing distortions in white tones. At full white, there are noticeable deviations, and the high-contrast image leads to poor tonal transitions in red, negatively impacting the overall colour quality. Before calibration, the image often displays a pink hue in its scenery.

The gamma contrast graph falls below the 2.4 mark, indicating an overemphasis on darker tones and a lack of prominence in lighter areas. Additionally, the EOTF curve shows a sharp rise early on, which can result in lost detail in bright scenes and an oversaturated appearance. These issues suggest that further calibration is needed to balance the colour reproduction and enhance the overall image.

Factory colour settings on the Xiaomi A Pro 2025 are average, and while this is common in televisions of its class, users seeking accurate colour representation may need to adjust the settings. After proper calibration, the TV delivers a more natural and vibrant palette, aligning better with cinematic standards. For those prioritising precise colour reproduction, professional calibration will significantly improve image quality.

The quality improves more than anticipated after calibrating the S90D television in movie mode. The white balance for HD and 4K HDR content has been fine-tuned to near perfection. While minor imperfections are still noticeable, they are subtle enough not to significantly impact the overall picture quality. Colours have become more cohesive, promoting a natural reproduction of details, particularly in scenes where precise colour representation is essential. It’s important to note that this particular model, in this size, uses a QD-OLED panel, which offers a broader colour gamut compared to other versions of this model equipped with a WOLED panel.

The contrast has also seen a marked improvement. After calibration, the gamma chart is much closer to the expected curve, resulting in a better balance between the bright and dark areas of the image. The EOTF curve, which previously indicated issues with overexposed scenes, now shows significantly better results. This improvement allows for greater preservation of details in the brighter parts of the image, particularly in HDR content.

After calibration, the Xiaomi A Pro 2025 TV shows significant improvement. The white balance is the most noticeable change, with previous errors corrected in HD and 4K content. Most deviations are now minimal, falling within an acceptable range, resulting in a more balanced and natural colour representation that enhances viewing comfort.

In terms of gamma, the drop has been largely addressed, leading to a more consistent rendering of tones across various scenes. However, the EOTF curve still hasn't seen substantial improvement, as there is limited control over dynamic tone mapping. This limitation means that some details may still be lost in bright scenes, affecting the perception of certain materials.

Despite these minor issues, the overall picture quality is improved after calibration. The enhanced white balance and reduced gamma issues provide a more realistic and enjoyable viewing experience. While further adjustments could enhance the image even more, the TV now showcases its potential, meeting the expectations of many users.

The television excels at smoothing tonal transitions, allowing colours to blend seamlessly, resulting in a natural and fluid image. The built-in noise reduction feature can further enhance these transitions, useful in certain situations. However, it is important to note that activating this option may overly smooth out the desired film grain structure, potentially compromising the authenticity and atmosphere of the image. Therefore, caution is advised when using this feature, to maintain the character and depth of the content.

The S90D model handles lower-resolution materials effectively, as demonstrated in the displayed image. The model's silhouette remains sharp and naturally reproduced, with fine details preserved. Additionally, the branches of the trees are well-defined, free from any visible jagged edges that might otherwise degrade the image quality. Thanks to efficient scaling, even lower-resolution content appears attractive on the screen, which is sure to please users who rely on a variety of content sources, such as standard cable or antenna television.

The Xiaomi A Pro 2025 handles tonal transitions effectively, especially when dealing with lower-quality materials. Thanks to its advanced digital processing, the colour contour removal feature performs surprisingly well. Setting this option to "Medium" provides the best balance, enhancing the smoothness of tonal transitions while avoiding excessive smoothing of other image elements, like film grain.

In the case of a tested frame featuring a model with numerous branches in the background, the TV demonstrated its digital processing strengths. Adding artificial sharpness clarified the model’s details, particularly enhancing the hair's definition. However, around the branches, subtle contours emerged due to digital intervention. While this adds detail to the overall image, excessive sharpness can sometimes cause certain elements to appear unnaturally highlighted.

The S90D TV, featuring a 120 Hz refresh rate matrix and up to 144 Hz in the appropriate PC configuration, delivers excellent motion fluidity. Samsung highlights a range of sharpness settings on a ten-point scale, allowing users to fine-tune the display to their preferences. In UFO tests, the OLED matrix showcases its strengths by eliminating any blurring. The ultra-fast pixel response ensures dynamic movements are faithfully reproduced.

Similar results can be seen in other sizes of this model with a WOLED matrix, which also offer outstanding image fluidity. Organic technology, in this case, is considered among the best on the market. The S90D image, regardless of the matrix type, is exceptionally sharp and detailed, making this television perfect for dynamic scenes, whether for gaming or sports broadcasts. Additionally, its refresh rate and sharpness capabilities guarantee that every movement is smooth and natural, satisfying even the most discerning users.

The Xiaomi A Pro 2025 features a motion smoothing option known as "Motion Smoothing," which is designed mainly for film viewing. It allows users to adjust the effect to either a more cinematic, film-like appearance with visible frames or a smoother, theatrical image. This feature will likely satisfy movie lovers. However, gamers and sports enthusiasts might be disappointed. The TV uses a 60 Hz refresh rate panel, typical for this price range, which doesn’t offer exceptional motion handling. Our "Ufo" test revealed some motion blur, so those seeking sharper moving images may find it lacking in this regard.

The S90D television is an excellent solution for gamers, offering a range of advanced features that elevate gaming quality to a new level. Equipped with HDMI 2.1 standard, the model supports modern technologies such as VRR (Variable Refresh Rate) and ALLM (Auto Low Latency Mode). Thanks to these solutions, the image is incredibly smooth, and the response to commands is instantaneous, which is crucial in dynamic titles. Additionally, the S90D supports HLG (Hybrid Log-Gamma) as well as G-Sync and FreeSync image synchronisation. This enables a perfect connection with Xbox, PlayStation, or PC, eliminating issues with tearing and stuttering. The built-in operating system offers the Xbox Game Pass app, providing access to a vast library of games directly from the television. This solution makes gaming even more convenient and accessible. The Game Bar feature provides quick access to essential information, such as current settings, performance statistics, and the ability to adjust image options. This allows for on-the-fly display parameter modification, which is extremely useful during intense gameplay. Despite lacking support for Dolby Vision, the S90D still offers excellent HDR image quality, allowing for full utilization of the potential of games and movies. As a result, the S90D represents a unique combination of modern technologies, outstanding image quality, and intuitive features, perfect for any gaming enthusiast.

The Xiaomi A Pro 2025 includes several gamer-friendly features, such as the Game Bar, which sets itself apart from the typical dashboards seen in other brands. This feature allows quick access to game-related settings, making it convenient during intense gaming sessions. The TV also supports Automatic Low Latency Mode (ALLM), automatically switching to a game-optimised mode to reduce signal delays. However, it lacks HDMI 2.1 support, limiting compatibility with the latest gaming consoles that require higher bandwidth. Additionally, it does not support features like VRR (Variable Refresh Rate) or G-Sync, which are becoming essential for gamers seeking smoother visuals and reduced tearing. While the Xiaomi A Pro 2025 has some useful features, there are better options in this price range offering more advanced gaming solutions.