Samsung QN900F vs TCL C6KS / C69KS / Q6CS

QN900F is a seriously bright TV – it can generate nearly 2000 nits, which is a level that remains unattainable for most models on the market. But the ability to achieve such brightness isn’t everything – it also matters whether the TV can make good use of it. And here it’s not always perfect. Our tests on cinematic scenes showed that in scenes like those from Life of Pi or The Meg, the QN900F can really shine – both literally and figuratively. In such moments, its greatest advantage, which is brightness, makes a huge impression. However, in more demanding scenes, things start to get tricky – similar to assessing contrast. When smaller, bright elements appear on the screen, the TV often struggles with the decision of whether to highlight them at the cost of black levels or perhaps maintain deep blacks but tone down the brightness. The result is situations where, for example, in the movie Sicario 2, the brightness dropped to just 200 nits, making details barely visible. The dimming algorithms could definitely be better, considering the class of this television.

And what about HDR? Here the C6KS performs quite well and – as is becoming the theme of this review – just like in the C6K model. The maximum brightness generated by this television is around 600 nits. In bright scenes, this translates to a really solid, cinematic effect and generally, video materials look good here. However, it's important to keep in mind the specifics of the dimming algorithm in this model. When very small, bright points (e.g. stars) appear on a dark background, the television can quite significantly dim them. The goal is simple: to eliminate blooming and maintain the best possible black. It's a reasonable compromise. Most viewers will definitely appreciate deep, “true black” more than additional microscopic details, the display of which could cause the screen to appear greyed out. Such is the nature of local dimming technology in this price range, and one must be aware of this. It’s also worth noting that the TCL C69KS (C6KS) has an additional PFS coating, which is marketed under the QLED technology slogan. Thanks to this, the colours are saturated and vibrant – our measurements showed that the coverage of a wide colour gamut reaches as much as 92%.

Testing the QN900F in Filmmaker mode, the distinct characteristics of the image quickly became apparent, despite this mode being designed to reflect the director's vision. The white balance was not perfect – the television had noticeable deficits in blue. This caused the entire scene to take on a warmer tone, as if someone had applied a subtle filter in shades of yellow and orange to the image. In films where bright shots dominate – for example, scenes in the snow or under strong daylight – this gave an impression of a slight warmth that does not always convey the director's intention. The second noticeable element was the management of brightness. The QN900F sometimes brightened the image more than necessary. It looked as if the exposure had been slightly "pushed up," which caused the scene to lose some naturalness. Shadows could be too shallow, and contrast slightly weakened. These are not disqualifying errors, but for a television in this price range, it is clear that the Filmmaker mode has not been perfected one hundred percent. This is particularly noticeable when we compare its image to what was visible after the screen calibration.

In contrast to the more expensive C6K model, in the tested C6KS we don't find an option in the menu labelled as Filmmaker Mode. Is this a reason to cry? Absolutely not. Our tests showed that in practice, in terms of colour reproduction, the lack of this specific label makes virtually no difference. The best available Film/Cinema mode here offers an almost identical picture profile to the aforementioned Filmmaker in the more expensive model. So we get a very similar image, just under a different name. Therefore, if you were wondering whether paying extra for the C6K would give you better colours – the answer is: no, in both cases the base is the same and requires slight adjustments.

After calibration, we managed to reduce the errors in white balance and adjust them to a level that can be considered acceptable. It's not perfect, but definitely better than the factory settings. Most colour errors now fall within the deltaE 2–3 range, so in practice, they shouldn't be noticeable during everyday viewing. The biggest improvement is evident in how the television handles brightness in SDR content. Shadows and details are no longer flattened, giving the image depth and naturalness. As for 4K HDR materials – colours themselves are no longer an issue, but one can still notice some imperfections in Mini-LED technology. The QN900F tends to excessively dim the smallest bright elements, causing them to sometimes disappear from view. However, it's worth noting that this is a much better solution than boosting the entire screen, which would ruin the contrast. This is more of a characteristic of the technology rather than a typical flaw, but it's worth keeping in mind. The effects of the calibration are really very good.

Thanks to the white balance adjustment, the C69KS's tendency to distort colours has been effectively limited, leading to a very good final effect. After calibration, we will no longer see excessive warmth in SDR scenes or overly cool tones in HDR. However, it is worth noting the brightness characteristic. In SDR content, there are hardly any objections – the image looks very good, especially in older films, TV shows, or YouTube materials. Evaluating the television's performance in HDR is much more difficult. Analysis of the EOTF curve suggests correct behaviour, but its practical variant shows certain limitations. The C69KS can overly brighten the smallest elements of the frame, while at other times it can dim the entire scene. Calibration has therefore brought clear benefits in terms of colour, but certain limitations resulting from local dimming and the way it is controlled by the C69KS cannot be avoided, which we also observed in the C6K test.

If we want to get rid of awkward tonal transitions that can be annoying, for example, while watching YouTube, we can use a feature called noise reduction. It works really effectively – it eliminates issues with colour blending when set to Standard level. However, as with most Samsung TVs, this comes with some compromises. Although we didn't notice this feature having a significant impact on the structure of objects in the image, it unfortunately reacts quite aggressively to film grain. Most people will likely appreciate this effect – the noise is simply removed – but if someone is looking for an image as close as possible to reference settings, we definitely recommend turning this option off.

When it comes to upscaling, or dealing with very low-quality content, the QN900F performs really well. On the test pattern with a model, the image looked clear, with only slight jaggedness that shouldn't bother most viewers. However, it’s worth mentioning one issue – the TV sometimes struggles with so-called overscan, which means older content may be slightly cut off. This can manifest, for example, with disappearing subtitles at the bottom of the screen.

The C69KS handles upscaling quite well. The tested 576p content looks surprisingly decent – a considerable amount of detail is preserved, and the algorithm adds a subtle ‘rounding’ effect to sharp edges, making the image appear more cohesive. However, it doesn't perform as well when it comes to smoothing tonal transitions. The television practically cannot improve them, leaving the image in a rather raw state. With older materials, this can be simply exhausting, as the lack of additional processing highlights all imperfections.

There’s really nothing to nitpick here – the QN900F looks great when it comes to motion. Thanks to its 165 Hz panel in 4K, you can confidently say that this TV is suited for both watching sports and gaming. The motion smoother plays a key role here. It works brilliantly – not just with sports broadcasts, where it can eliminate blurring and image judder, but also in games, where animation becomes clearer and more fluid. And of course, if someone likes to experiment with movies – they have that option as well. At lower settings, you can see a slight graininess and a filmic quality, while higher settings introduce a soap opera effect. So everyone can tailor the picture to their preferences, and the TV has the power to handle it.

C69KS offers a simplified motion enhancement panel in movies, allowing users to adjust the intensity of the effect using a slider. This makes it easy to tailor the smoothness to personal preferences. It also deserves credit for the ability to utilise higher refresh rates – even though the panel operates natively in 4K at 60 Hz, by lowering the resolution to 1440p, modes of 120 and 144 Hz can be enabled, on both consoles and PC. This sounds like great news, however, in practice, the image at these settings trails exceptionally badly. The effect is so pronounced that the overall experience simply appears mediocre and loses its appeal in everyday use.

[UPDATE] We have updated our 2025 Samsung TV reviews following the release of firmware version 1131, which officially restores the essential HGiG (HDR Gaming Interest Group) support.

It's really good here. The QN900F offers a full set of features that we would expect from a top-notch gaming TV – we have VRR, ALLM, Game Bar, as well as cloud gaming apps. However, the biggest standout is its proprietary motion smoother, which also works in games and – importantly – does not add noticeable input lag. This is something we won't find in other competitors. Unfortunately, there is also something concerning. This year, Samsung has clearly messed up something with its TVs. During the testing of the QN900F before its update, it had the HGIG feature, which allowed for perfect adjustment of HDR settings for consoles. However, according to our procedures, we always update the hardware to the latest version – to give the manufacturer a chance to fix any issues. And here… it went the other way.After the update, the HGIG feature disappeared from the menu, making proper configuration of the console for HDR practically impossible. It was supposed to be complete – 165Hz, four HDMI 2.1 ports, a full gaming package… but unfortunately, it turned out to be a little mishap. What a shame.

If we overlook the smudging and lack of native 4K at 120 Hz, the C69KS is impressive in how well it performs for gaming. You get everything you would expect from a gaming TV: Variable Refresh Rate (VRR), Auto Low Latency Mode (ALLM), Dolby Vision Gaming mode, and a consistently functioning HGiG. The TV can also operate at 120 or even 144 Hz at lower resolutions, making gameplay on console or PC smoother. Additionally, there's a clear Game Bar that allows you to quickly check key settings while gaming. As a result — despite a few limitations — the C69KS can be a genuinely successful screen for gamers.