Samsung S90H (QD-OLED) vs Sony BRAVIA 2 II (S25M2)

The Samsung S90H is a genuinely bright TV for the mid-range OLED segment. In synthetic tests its peak brightness reached around 1650 nits. That’s an impressive result in this class, roughly 50% higher than what we have seen from previous models in this price bracket. Most importantly, these tests translate directly to real video material. In four out of five film clips we tested, the S90H’s brightness ranged between 1300 and 1500 nits. That headroom allows it to reproduce most HDR films with very high dynamic range and without obvious compromises, especially in material mastered to 1000–1500 nits. In practice light effects, reflections and explosions have the appropriate punch, and the picture does not appear dimmed. Of course, on full-screen very bright scenes the result is naturally lower and drops to around 900 nits. This is a direct result of the OLED panel’s protection systems working to prevent overload. Even in this scenario there is little to complain about. Those 900 nits across the whole screen is still a very high level, ensuring excellent dynamic range in HDR content.

Colour has always been a major strength of QD-OLED TVs, and the S90H is no exception. The DCI-P3 colour space we measured reached a full 100% (actually 99.9%), while coverage of the much wider BT.2020 gamut hit about 89%. That’s an excellent result, enabling very saturated and vivid colours in HDR content. It’s worth emphasising that QD-OLED’s advantage over WOLED panels is not limited to palette coverage alone. In practice it’s mainly visible in the higher brightness of saturated colours, that is in a greater colour volume. As a result, intense reds, greens and blues in HDR look more vibrant and more striking.

The Sony Bravia 2 II is not a very bright TV and unfortunately that is immediately apparent in HDR. In our measurements brightness stayed around 300 to 330 nits, which is clearly too low for the brightest parts of the image to look truly impressive. In practice, HDR here does not differ that much from standard SDR. Bright highlights, the sun or lamps are of course visible, but they lack the intensity you would expect from HDR material. The Bravia 2 II therefore performs much better with standard SDR content, and in that use its limited brightness will be least noticeable.

Colour gamut coverage

The Sony Bravia 2 II is also not impressive in terms of colour. The TV does not use any additional gamut‑expanding filter, such as the quantum dots found in QLED TVs or a PFS phosphor layer. In our measurements coverage of the DCI‑P3 gamut was about 78%, and the very wide BT.2020 roughly 57%. That's definitely too little to talk about truly saturated colours in HDR material. More intense reds, greens or turquoises will simply be less striking than on TVs with an expanded colour gamut. The Bravia 2 II therefore performs much better in the Rec.709 standard, the gamut used for films, series and television in SDR.

The next stage of the test was to check how the S90H handles colour reproduction without any calibration. As always, we carried out the measurements in Filmmaker Mode, the best factory picture preset. And here Samsung really deserves praise. The factory tuning is at a very high level, and a few years ago this was not one of its strong points. The average colour error (Delta E) remained around 3, which is below the level at which most people can notice any inaccuracies. Only in the brightest shades of grey did the values slightly approach 4, but even then it's hard to regard this as a real problem while watching. For out-of-the-box settings, the result is simply excellent.

The out-of-the-box colour reproduction in Cinema mode was actually quite good, at least for ordinary SDR material. The Bravia 2 II had a slight tendency to boost reds, so some colours shifted to slightly warmer, at times faintly pinkish, tones. However, this wasn’t a major fault and during normal viewing the picture still looked fairly natural. There was a bit more happening with image brightness. Looking at the gamma curve, you can see Sony doesn’t stick perfectly to the reference value. The darkest areas are slightly lifted, while as brightness increases the gamma gradually rises and a larger part of the picture becomes darker than it should. That said, it’s not such a large difference as to be very distracting in everyday viewing. Overall, SDR straight out of the box performs quite respectably.

The situation is considerably worse in HDR. We’ve already mentioned the limited colour gamut, but in addition the Bravia 2 II noticeably manipulates image brightness here. The EOTF curve sits below the reference value for a large part of its range, which means the TV renders most mid and brighter parts of a scene darker than the source material intends. Only towards the very end of the range does the curve flatten out, as the panel reaches the limits of its capabilities. Combined with a peak brightness of around 300 nits, this results in HDR that not only lacks much brightness, but can also simply look too dark.

All right, but you know we wouldn't be ourselves if we didn't also check how far we could push the S90H after professional calibration. And there was no big surprise. Since the factory settings were already very good, there wasn't much room for improvement. Even so, we managed to refine the picture to near perfection. After calibration the mean colour reproduction errors fell below the threshold of perception, with Delta E values under 2 for both SDR and HDR material. We also improved the brightness response, so the image more faithfully reflects the creators' intent and maintains appropriate tonality across the whole luminance range. After professional calibration the S90H therefore becomes a display very close to reference.

Will the difference be spectacular for everyone? Not necessarily. The factory settings already deliver a very high level, so in everyday viewing some people may not notice a dramatic jump. Much also depends on the individual unit. Our sample was very well tuned straight out of the box, but that doesn't mean every S90H will perform at the same level. Even identical models can differ from each other in terms of factory calibration. That's exactly why professional calibration makes sense: it allows a specific unit to be brought to the highest possible accuracy, rather than relying on a bit of luck when buying.

Calibration did a lot for the Bravia 2 II, particularly with SDR content. Above all, we managed to even out the white balance and tidy up the gamma, which now follows the reference value much more closely. As a result, the image no longer has the previous pink cast, and the brightness across different areas is much better organised. You can also see this in the colour errors, which after calibration fell to a very low level (with slight issues in the most saturated reds). We also partially managed to rein in the Bravia 2 II in HDR, especially in the way the television handles image brightness. However, there is one thing no calibration can fix: the capabilities of the panel itself. A narrow colour gamut means the television is physically unable to reproduce the most saturated colours present in HDR material. On top of that, the low contrast of the IPS panel means darker scenes are veiled by a grey haze, which robs colours of some of their depth. So we can improve how the Bravia 2 II makes use of its capabilities, but unfortunately we cannot overcome the panel's inherent limitations.

In this respect Samsung has changed practically nothing compared with last year’s model, which is actually quite good news. The feature responsible for smoothing tonal transitions still very effectively limits the posterisation effect. However, you should remember that it works rather aggressively, because besides the artefacts themselves it can also remove film grain and slightly soften fine image detail. As always, this is therefore a matter of compromise and personal preference. If you want the most faithful reproduction of the source material possible, we recommend leaving this function turned off.

There is also little to be said about upscaling in terms of revolution. The S90H uses the same proprietary NQ4 Gen3 image processor as its predecessor, so scaling quality has remained practically unchanged. The TV handles lower-resolution material well, effectively improving its sharpness. However, the overscan problem has still not been solved. With some older material, especially archival recordings, it may happen that a portion of the image at the edges is cropped. It’s a minor flaw, but a shame Samsung has left this issue unchanged for another year running.

The upscaling on the Bravii 2 II is quite good and, in that respect, the TV matches the standard Sony has set. Lower-resolution content is sensibly upscaled to 4K, and the image is slightly smoothed in the process without excessive edge sharpening. The situation is worse when it comes to improving footage with visible compression artefacts. This is handled by the "Digital Noise Reduction" function, which at the "High" setting can indeed smooth out some unpleasant tonal banding. The problem is that it does this rather aggressively and, along with the imperfections, it also removes a lot of fine detail, including natural film grain. What is more, when there is more motion on screen its effectiveness drops sharply and any improvement is then minimal. For everyday use we therefore tended not to use this function.

In terms of motion handling the S90H delivers a very high level. A new feature here is a panel with a refresh rate of up to 165 Hz, although in practice that will mainly benefit PC gamers. Films, series and sports broadcasts do not use such high refresh rates, so when watching them the difference compared with the standard 120 Hz will not be noticeable. That said, thanks to the OLED panel's lightning-fast response time motion is very clean and the picture does not suffer from the motion blur typical of many LCDs. Samsung has equipped the television with extensive motion-smoothness settings. You get two sliders: judder reduction and blur reduction, which let you easily tailor the picture's character to your own preferences. You can easily achieve a very smooth image when watching sport, but you can just as well preserve a more cinematic feel at the typical 24 frames per second. It all depends on which effect you prefer.

Bravia 2 II uses a 60 Hz panel and, given its capabilities, handles motion quite well. However, bear in mind that it is a basic panel and its limitations are already clearly visible, especially during sports. The TV cannot interpolate 50/60 fps material to a higher refresh rate, so it cannot further improve the sharpness of fast-moving objects. For films and series, however, it offers a conventional motion smoothing feature that can reduce the characteristic judder of material shot at 24 fps.

From the outset the Samsung S90H feels like a TV designed with gamers in mind, and it's easy to see why. The manufacturer has equipped it with almost everything you could expect from a modern gaming screen. You get as many as four full-bandwidth HDMI 2.1 ports, support for ALLM and VRR, and very high refresh rates. There's also a clear Game Bar that lets you instantly check key picture parameters or change settings without leaving the game. Another very welcome improvement is the HGiG behaviour. Last year it could cause quite a few problems, but on the S90H it works exactly as it should.

Samsung's ace up its sleeve remains its proprietary Game Motion Plus mode. The feature works similarly to the motion smoothing used for films: it improves animation smoothness in games while keeping input lag at a very reasonable level. For titles running at 30 or 60 fps, with the right settings input lag did not exceed 40 ms in our tests. That's a very good result, especially since with many manufacturers enabling similar features results in delays several times higher. Game Motion Plus does not, of course, replace Dolby Vision Gaming, as it's a completely different type of feature, but overall it's a gaming addition that many players may find more noticeable. Smoother motion in 30/60 fps games often makes a bigger difference than HDR itself (which, incidentally, is often poorly implemented in games).

The Bravia 2 II is not a television that lends itself well to gaming, and the list of features shows that quite quickly. You essentially only get the automatic low-latency mode ALLM and a simple Game Bar that lets you view basic signal information and change a few settings. But that is where the list of strengths ends. The TV does not support VRR or 120 Hz (not even at lower resolutions), and on top of that it has problems with a proper implementation of the HDR HGIG format. It is suitable for occasional console gaming, and thanks to low input lag controls remain responsive, but if someone is looking for a TV primarily for games, the Bravia 2 II will simply be a rather limited choice.