Samsung Q6F (IPS) vs LG OLED C6 (WOLED)

Unfortunately, the Samsung Q6F is a very dark model. Its peak brightness in HDR does not exceed 250 nits, which is definitely too low to even talk about any "high dynamic range" or HDR effect. In practice, it's better to stick to content in SDR format, which simply looks more predictable on this TV. Another issue is the global dimming technique – in scenes with a lot of black, the TV drastically dims the entire screen to artificially improve the black levels. This results in the image becoming even darker, with brightness sometimes dropping below 100 nits. The only consolation is the QLED technology, but even here it's average. The applied quantum dot layer is not of the highest quality, as the coverage of the DCI-P3 colour gamut does not exceed 90%. Because of this, colours in HDR content may simply appear unsaturated.

The HDR performance of the LG C6 is really very good. LG Display’s new WOLED panel has mainly brought a significant increase in brightness. In our unit we measured around 1500 nits and, importantly, the TV can show similar values in many normal movie scenes as well. That gives HDR real punch. Bright highlights, lamps and sunlight can be genuinely intense, and most HDR movies simply look very impressive. Of course it’s still an OLED, so brightness falls in scenes with a lot of white. The fifth scene from the movie The Meg illustrates this well, where the C6 reached around 600 to 700 nits. That’s still a very good result, but it also shows the new panel hasn’t shed all the limitations typical of OLEDs.

Colours

When it comes to colours, it’s also hard to raise major objections. The C6 covers about 99% of the DCI-P3 gamut and roughly 75% of BT.2020. In practice colours are very saturated and, importantly, stable regardless of the scene. That’s worth emphasising, because not every TV behaves the same in this respect. In some RGB Mini LED models colour saturation can depend more strongly on image brightness. A wider colour gamut today is mainly offered by QD-OLED TVs and new SQD models with a new generation of quantum dots. However, the C6 still performs very strongly here and is able to produce suitably saturated colours in most movie scenes.

We tested the television in Filmmaker mode, which showed us two completely different sides of this model. Looking at SDR content, we were honestly shocked at how good this television looks straight out of the box. It was really hard to pick on anything here. Despite a slight 'messiness' in white balance and some slightly brightened details in the blacks (which directly stems from the IPS panel construction), colour errors hovered around the '2' level. This is not only a surprisingly good result but rather phenomenal, considering the price of the device.

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

Right out of the box the LG C6 is quite well set up, especially if you choose the Filmmaker mode. In SDR material the white balance is decent, although as brightness increases there is a slight lack of red. The image becomes a bit cooler, but not enough for it to be very noticeable during normal viewing. More is happening in the brightness characteristic. Gamma is a little low and instead of holding at 2.4, for a large part of the range it sits closer to 2.1–2.2. In practice the C6 slightly brightens midtones. Shadows are therefore more readable, but the image loses some depth compared with how it should look in a darkened room.

In HDR the situation is a bit more interesting. The start of the greyscale looks very good, but from about 20–30% brightness the white balance starts to drift increasingly. As brightness rises there is more red and a noticeable lack of blue. In the brightest sections the difference is already significant and also affects the reproduction of some colours. The EOTF curve itself is followed quite well through most of the range. The C6 only tends to slightly brighten the image, which we also saw in our film comparisons. The largest deviation appears around the brightest parts, where the TV starts adapting the signal to the panel's capabilities.

The factory Filmmaker setting in HDR is therefore not perfect, but overall performs well. The biggest area for improvement is the white balance, especially at high brightness.

After our calibration, the colours in SDR mode looked even better – the result is truly surprising, as colour errors at a level of "1" are something typically seen in devices costing several thousand dollars. In this respect, the Q6F is really a great screen for everyday television, less demanding series, or movies. Unfortunately, our intervention in HDR mode did not yield a noticeable improvement. The television, due to its weak 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 primarily exists as a label on the box – for everyday use, we definitely recommend watching content in SDR format.

LG TVs have long responded very well to calibration, and the C6 is no exception. After adjustments we managed to set the white balance practically perfectly, and most colour errors fell below 3, often down to around 2. In practice this means very accurate colour reproduction in both SDR and HDR. An interesting detail only appeared with the HDR brightness response. On a classic EOTF chart everything looks almost perfect and at first glance it would be hard to find fault. Only when we measured the TV’s behaviour using filters based on real film scenes did it become clear that the C6 has a slight tendency to artificially boost image brightness.

It’s not a huge difference and many viewers may even see it as a positive, because HDR looks a bit more striking as a result. From the point of view of fidelity to the source material, however, it’s not ideal — some scenes are simply a touch brighter than the filmmaker intended. Interestingly, this is rather unusual for LG. In previous generations the brand’s TVs typically held very closely to the reference picture curve after calibration. The C6 is still very close to the standard, but that subtle brightness 'boost' can indeed be noticed in films and TV series.

Q6F handles upscaling lower resolution content to native 4K very well. The scaling is surprisingly good, even for such an inexpensive QLED model. The only downside is when watching very low-resolution materials like 576p (typical for old DVD players) – the image may appear slightly cropped. This is because the TV does not allow the option to turn off the Overscan feature, which is a common issue with Samsung devices.

The situation is completely different when it comes to digital processing, or the attempt to smooth the image of unwanted artifacts. Here, the TV completely fails. Although in the menu we find a feature called "Noise Reduction," it does not produce any noticeable results regardless of the slider setting. The only thing it seems to do is introduce undesirable errors into the image. Despite its presence in the system, we definitely do not recommend using it.

Here the LG C6 has taken a really big step forward. The TV uses the same processor found in the flagship G6, and in terms of image processing the two models are very close. That's a big plus, because in this area LG's processor this year performs excellently. The "Smooth Gradation" function works particularly well. With heavily compressed material it can effectively hide ugly tonal banding and artefacts that often appear, for example, in lower-quality streaming. It's best to leave it on the "Low" setting. Then the improvement is clear, and the TV doesn't yet start blurring fine detail. Higher levels smooth the image more aggressively, but can already remove some of the natural texture of objects on screen. Upscaling itself also performs very well. Lower-resolution content is properly sharpened, edges look clean, and the processor quite effectively reconstructs fine details. In that respect the C6 is really close to LG's best TVs and the differences compared with the G6 are small.

The 60 Hz panel in the Samsung Q6F is standard in this price range, making it a rather average model for dynamic sports or gaming. However, when it comes to movies, the TV performs quite well thanks to its smoothing feature. The "Motion Vibration Reduction" option allows you to adjust the motion smoothness to your own preferences – from preserving a cinematic feel to full smoothness.

The LG C6 features a panel with a maximum refresh rate of 165 Hz, which is great news especially for gamers using a powerful PC. For movies, sport and consoles we’ll of course be limited to 120 Hz at most, but even then it’s hard to fault the motion clarity. As you’d expect from an OLED, the panel’s response time is near-instant. Moving objects therefore don’t leave the characteristic smearing you still see on LCD TVs. This is especially noticeable in sport and fast-paced games, where the picture remains very clean even during dynamic movement.

For movies and TV, LG has also included a motion smoothing system called TruMotion. In the user settings you’ll find two separate sliders. De-Judder is primarily for low-frame-rate material, namely movies and TV series at 24 fps. You can use it to slightly reduce the characteristic judder or increase it if you prefer a much smoother picture. De-Blur, on the other hand, is useful for higher-frame-rate content, mainly sports broadcasts and 50/60 fps TV.

We won’t beat around the bush – the Q6F is not a television designed with gamers in mind. While it does include features like ALLM (Auto Low Latency Mode) and VRR frame syncing for consoles, that's pretty much where the list of advantages ends. Beyond these basics, the television offers nothing more that could satisfy those who spend a lot of time in front of a console. It's a real shame that a useful tool like Game Bar, which allows for quick control of game parameters in higher-end Samsung models, is missing here. In terms of gaming, this is an absolutely basic model and it will only suit 'casual' gamers.

LG has long focused heavily on gamers, and the C6 essentially lacks nothing important. The TV supports 4K at 120 Hz from consoles, and when connected to a PC it can even run at 165 Hz. On top of that there’s VRR from 40 to 165 Hz, ALLM and a properly functioning HGiG. Another big plus is support for Dolby Vision in games, so the Xbox Series X can use that format without giving up game mode. The package is rounded out by the Game Bar, which lets you quickly check key signal parameters and change settings without leaving your game. In terms of features alone, the C6 is one of those TVs it’s really hard to fault. Whether you play on PlayStation, Xbox or PC, practically everything you could expect from a modern gaming TV is available here.