SAMSUNG S90F (WOLED) vs Samsung Q6F (IPS)

Does the S90F handle not only black, but also bright parts of the image? Definitely yes. Tales of OLEDs as “dark screens” can slowly be regarded as a myth. The Samsung S90F, like the LG C5 based on a very similar panel, achieves brightness exceeding 1000 nits. This is a value entirely sufficient to enjoy impressive and dynamic HDR imagery – both in films and series. Most of the scenes we tested look superb, with well-defined highlights and high contrast. Of course, OLED technology still has its limitations – in very bright, full-screen sequences, such as the test pattern from the film The Meg (picture 5), the television may noticeably dim the image. However, it should be emphasized that such scenes are rare. It can be considered that the HDR effect is good enough that even mid-range OLED models like the S90F can provide a cinematic experience in the home living room.

The Samsung Q6F is, unfortunately, a very dark model. Its peak brightness in HDR does not exceed 250 nits, which is a value that is decidedly too low to even talk about any effect of “high dynamic range,” or HDR. In practice, it’s better to stick to content in SDR format, which simply looks more predictable on this television. Another problem is the global dimming technique – in scenes with a lot of black, the television drastically dims the entire panel to artificially improve the black levels. This causes the image to become even darker, and the brightness can drop below 100 nits. The only consolation is supposed to be the QLED technology, but even here it is average. The layer of quantum dots used is not of the highest quality, as the coverage of the DCI-P3 colour palette does not exceed 90%. As a result, the colours in HDR content may simply appear under-saturated.

The Samsung S90F, like most modern televisions, offers many picture modes, but – in line with our testing tradition – we assessed it in the best one, which is the Filmmaker mode. This way, the image looks significantly more natural than in the default, often oversaturated settings. It was neither overly saturated nor artificially muted – just closer to what should be seen. Of course, "more correct" does not mean "ideal". Unfortunately, our S90F unit had considerable issues with white balance, especially in the blue range, resulting in a slightly yellowish filter being applied to most scenes. Someone might say it looks more "cinematic" – because it is warmer – but let's not kid ourselves, George Lucas did not film Star Wars in sepia 😉 (you will find the comparison with the scene as always below).

Additionally, in HDR materials, there was a noticeable issue with brightness management. The EOTF curve showed a clear "spike" in brightness – the television brightened the image more than it should have, which made some effects look overly intense and diverged from the reference. Fortunately, some of these problems can be eliminated through professional calibration – you will read about its effects later in the review.

We tested the television in Filmmaker mode, which showed us two completely different facets of this model. Looking at SDR content, we were genuinely shocked at how good this television looks straight out of the box. It was really difficult to find fault with anything here. Despite a slight 'muddiness' in the white balance or somewhat brightened details in the blacks (which directly stem from the design of the IPS panel), the colour errors hovered around a level of '2'. This result is not only surprisingly good but downright amazing, considering the price of this device.

On the other hand, what the Q6F displayed in terms of colours after switching to HDR mode was a very unpleasant surprise. The errors in colour reproduction and palette were so enormous that our charts literally ran out of scale. Of course, since Samsung even in such an affordable model offers very extensive calibration options, we decided to approach the issue professionally and see what could be done during calibration.

After calibration, we managed to eliminate practically all the previously mentioned errors. Older films in SDR quality finally look as they should – without the sepia effect or artificial aging of the image. The atmosphere of the classics returns to its rightful place (you’re welcome, Star Wars fans), and the colours no longer resemble an Instagram filter.

One of the key changes was also the improvement of brightness characteristics in HDR content. We managed to control the EOTF curve in almost a reference manner. Yes, the most demanding users may spot minimal deviations in brightness, but honestly – most viewers won’t even notice that. And it's no wonder, because the vast majority of errors are below a ΔE value of 3, which is below the threshold of visibility. After calibration, the S90F (WOLED) truly becomes an excellent display – one that provides nearly perfect picture quality.

After our calibration, the colours in SDR mode looked even better – the result is truly surprising, as colour errors at the '1' level are something generally seen in devices costing several thousand pounds. In this regard, the Q6F is really an excellent screen for everyday television, less demanding series or films. Unfortunately, our intervention in the HDR mode did not bring a noticeable improvement. The television, due to its poor blacks and low coverage of a wide colour gamut, still has significant issues with proper colour saturation, especially reds. This is an example of a device where HDR exists mainly as a label on the box – for everyday use, we definitely recommend watching content in SDR format.

Digital Image Processing in the S90F:

Fortunately, Samsung, as in most of its models, effectively manages the unwanted posterisation effect in the S90F. The feature responsible for this aspect is noise reduction, which does a decent job of smoothing tonal transitions and eliminating unnatural colour connections – of course, within its limitations. Unfortunately, it operates rather aggressively, so using it comes with compromises. In addition to improving gradation, it can also remove film grain or gently soften facial features. In this case, the choice is yours – do you prefer a more "clean" image, or do you want to preserve the original texture of the material?

Image Scaling in the S90F:

In this year's model, Samsung implemented its own AI processor – NQ4 Gen3, which does quite well with upscaling. In our test scenes, the television effectively "pulled up" lower quality towards artificial 4K – the image was more pleasant to view, and the differences in sharpness between native and scaled content were minimal. Unfortunately, behind all this AI marketing facade lies a certain shortcoming. The S90F struggles with overscan. If you reach for truly archival materials – e.g. a VHS tape of your parents' wedding – you must expect that the lower part of the image may be cut off. The image adaptation function to resolution simply does not work here as it should.

Q6F performs very well in upscaling lower-resolution content to native 4K. The scaling here is surprisingly good, even for such an inexpensive television from the QLED series. The only downside is the situation where we are watching very low-resolution materials, such as 576p (typical for old DVD players) – in which case the image may be slightly cropped. This is due to the fact that the television does not allow the Overscan function to be turned off, which is a typical issue with Samsung devices.

The situation is completely different when it comes to digital processing, specifically the attempt to smooth the image of unwanted artifacts. Here the television completely fails. Although there is a function in the menu called "Noise Reduction," it yields no visible results regardless of the slider setting. The only thing it manages to do is introduce undesired errors in the image. Despite its presence in the system, we definitely do not recommend using it.

The S90F really handles motion excellently – after all, it’s an OLED with a 144 Hz panel, so sports and games look absolutely stunning on it. The image is fluid, clear, and there’s no room for any ghosting or blurring that sometimes plagues cheaper LCDs.

The television is also equipped with motion smoothness settings, allowing you to customise everything to your preference. We have motion blur reduction and judder reduction – you can set it so that the image is super smooth (even to that soap opera effect), or more cinematic, with the classic 24-frame 'choppiness'. The choice is yours; Samsung doesn’t impose anything.

The 60 Hz panel in the Samsung Q6F is standard for this price range, making it rather average for dynamic sports or gaming. However, when it comes to films, the television performs quite well thanks to the motion smoothing feature. The "Motion Reduction" option allows you to adjust the smoothness of movement to your own preferences – from maintaining a cinematic character to complete fluidity.

When it comes to gaming features – the S90F has absolutely nothing to fault. Aside from the lack of Dolby Vision, which is already the norm for Samsung. The television operates at 144 Hz, has four HDMI 2.1 ports, so you can easily connect more than one console or PC. Onboard, we also find the Game Bar – a practical tool that allows you to quickly glance at picture settings, VRR status, ALLM mode, and other useful options. Game Motion Plus also deserves a mention – Samsung's proprietary motion enhancer that is the only one truly functioning sensibly in games. The image appears smoother, but without any artificial effects or slowdowns.

It is also worth mentioning the HGiG feature, which – much to our slight surprise – works correctly. We're mentioning this because Samsung clearly broke something in one of the last updates, and in some models, the option responsible for HGiG simply... disappears from the menu. Setting it up becomes practically impossible. Fortunately, our S90F unit did not have this issue, but the situation is dynamic, so it's worth keeping this in mind and regularly checking for updates and information from the manufacturer.

We're not going to beat around the bush – the Q6F is not a television designed for gamers. Although it features additions like ALLM (automatic low latency mode) and VRR frame synchronisation for consoles, the list of advantages basically ends there. Aside from these basics, the television offers nothing more that would satisfy those who spend a lot of time in front of a console. It’s a great shame that such a useful tool as Game Bar, which allows for quick control of game parameters in Samsung's higher models, is missing here. In terms of gaming, this model is absolutely basic and is only suitable for "casual" gamers.