LG OLED C4 vs Samsung M80H

The results of HDR materials are definitely among the better ones. Practically every film significantly exceeds the 700 nits barrier, allowing for a very realistic image. Of course, none of them surpasses the magical thousand, yet the combination of such results and unlimited contrast and black effectively boosts the outcome optically. The last of the scenes, featuring a full-screen burst of sunlight, is actually less bright than the others, although it still represents a commendable level. It is also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will allow for achieving extremely vivid colours.

The M80H is not among the brightest TVs. Its peak brightness is around 350 nits and we saw similar results in most of our test scenes. That is not enough to achieve truly striking HDR; bright highlights lack the necessary punch and the overall image is a bit too dark. In practice HDR on the M80H resembles a well-presented SDR image more than noticeably more dynamic material with a wide brightness range. The image can still look acceptable, but it is hard to speak of strong specular highlights, clearly glowing light sources or an effect that immediately distinguishes HDR from ordinary content.

Colours

One of the M80H's stronger points is its colours. The TV uses a filter based on PFS backlighting, which allows it to display a much wider colour gamut than a standard LCD screen without filters. Our measurements confirm this – the M80H covers around 96% of the DCI-P3 gamut and 72% of BT.2020. Those are really good figures, which allow colours to be deeply saturated. Samsung's approach here is interesting. The M80H is not part of the QLED family, even though in terms of colour it is practically indistinguishable from models carrying that badge. From an image-quality point of view it doesn't really matter though — the colours are simply good.

The best factory mode implemented in the tested television was "Filmmaker". It was this mode that we used during all tests. This mode proved to be quite good in terms of colour reproduction; however, other shortcomings effectively detracted from the enjoyment of viewing. Starting with the most basic aspect, the white balance, it was easy to notice that it was marked by a dominance of red, which overall changed the characteristics of the image. We could thus see a strong yellowing of the whites and a shift of all colours towards warmer shades. The gamma, which is a curve just as important, if not more so, was quite significantly lowered, resulting in a considerable drop in contrast, except at the beginning of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Taking a closer look at films with a wide dynamic range, we can observe exactly the same phenomenon of yellowing of the white balance as in films with a standard colour palette. The EOTF curve, which replaces our gamma curve, is practically perfect and cannot be faulted.

Filmmaker Mode is set fairly well out of the box, although it falls short of perfection. In SDR material the most noticeable issue is an excess of red in the white balance, which makes the image appear a little warmer than it should. HDR content has a similar character. As for the brightness response, in SDR the gamma stays close to the target value for most of the range. Small deviations are mainly visible in darker areas, which in places are a bit too crushed. In HDR the darkest details are slightly lifted, while from around 65% brightness the image begins to be slightly darkened. This is largely due to the way the TV controls its brightness. Overall, Filmmaker Mode looks pretty good straight out of the box, but the picture can still be improved.

As we mentioned earlier, LG televisions are equipped with advanced tools for carrying out the calibration process. We therefore used them to model the image in the way that the director intended. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates that this is how a film should look. It is worth looking at the colour errors on the "ColorChecker" palette here, where practically none of them exceeds "1", apart from two samples.

After calibration, the M80H fares very well, especially with the most ordinary SDR content. Regular broadcast TV, YouTube and films watched without HDR can look very good on it. After correcting the white balance the errors are small, although sometimes we can still see that the TV tends to overdo the most saturated reds. In HDR it is also possible to improve the picture and correct its main faults, but it is not at the level of pricier models. Samsung quite heavily restricts colour adjustment in HDR, so in many areas we have to accept what the TV offers out of the box. Calibration lets us improve some parameters, but we are no longer able to change the overall character of the M80H's image.

Once again, we will take a look at the function responsible for smooth gradation, but we will also address the one that aims to improve the quality of lower-quality materials. The default smoothing of tonal transitions, as we have seen, was not the worst, but it can still be improved. The function has a slider, which allows us to adjust its strength. We recommend using the first one, as it yields very good results and does not blur important details.

Image scaling in LG C4 is quite good; however, it cannot be said to be without flaws. The image is slightly sharper by default, although not in a very noticeable way. Admittedly, there are jagged edges on the trees, but this is not a major issue compared to other manufacturers.

Although the M80H is positioned fairly low in Samsung's range, the manufacturer equipped it with one of its stronger processors, the NQ4 AI Gen2. The same chip can be found, for example, in Neo QLED TVs and the lower-tier S85H OLED. That is good news, because when it comes to improving weaker sources the processor performs really well. Upscaling is the strongest point. Low-resolution content is displayed correctly and edges do not look overly jagged. Of course the TV will not create details that are not present in the source, but regular broadcast TV and older recordings look decent on it. One drawback is the overscan effect, that is edge cropping, which cannot be completely turned off. The tonal transition smoothing function, the so-called noise reduction, also works well. The processor can effectively reduce visible traces of heavy compression, but it does not do this without side effects. At higher settings it may over-smooth the image, remove some fine detail and even eliminate film grain. For that reason we recommend using this function mainly for content that really suffers from strong compression and posterisation.

The maximum refresh rate that we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the television to a very powerful PC. In other cases, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sport or content with a lot of motion dynamics. For those requiring high fluidity of the image, the manufacturer has implemented a multi-step motion smoother called "TrueMotion". It has been divided into two separate sliders that adjust the sharpness of moving images (De-Blur) and judder (De-Judder). Both sliders can be set within a range from 0 to 10, with each degree affecting the degree of smoothing, allowing everyone to find their golden mean.

The LG OLED C4 panel features an average response time of less than 1 ms (which directly results from our measurements), allowing for an incredibly clear image that is unattainable for LCD televisions, whose response times can be as high as several milliseconds. This is clearly visible in the pictures from the "UFO Test," showing no trailing blur behind the object.

The M80H performs very well for watching sport and for gaming. The TV is fitted with a panel offering a refresh rate of up to 144 Hz at 4K, and when the resolution is lowered to Full HD it can even support 240 Hz. PC gamers will benefit most from the latter.

The panel also handles content displayed at 120 Hz well, which is particularly important for console gaming. The high refresh rate is also useful when watching sport, and motion blur is relatively limited. That matters because VA panels are not known for top results in this area. With the M80H, fast-moving objects do not show pronounced smearing.

We can already say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of compatibility with consoles and PCs. Thanks to the implementation of four full bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has included all features that enhance the gaming experience, among which we find simultaneous support for FreeSync and G-Sync technology. With such a tandem, gamers with a graphics card from AMD or Nvidia can confidently opt for C4. However, what should delight the players requiring the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The first is particularly important as it works with extremely low input lag in all settings.

A standard in the Korean manufacturer's televisions is also the implementation of GameBar, allowing for quick adjustments of settings "on the fly" without the need to exit the game. It also enables image adjustments for visually impaired individuals, which is a very nice touch. Another important piece of information is that when VRR technology is enabled, we will not experience a drop in contrast. This is, of course, due to the panel's design and the absence of conventional backlighting. However, it is normal for shades of grey to flicker slightly, although this is a characteristic feature of this function regardless of the manufacturer and television.

In summary: LG C4, just like all of the manufacturer's OLEDs equipped with high refresh rate panels and HDMI 2.1 ports, creates a harmonious whole with consoles. In practice, it is a complete television, and if we expect the highest possible performance in gaming, C4 will be an ideal choice.

The M80H could be a very good choice for gamers on a slightly smaller budget. In terms of features it offers essentially the same as far more expensive Samsung TVs. All three HDMI ports support the 2.1 standard, so even if one is taken by a soundbar connected via eARC there is still room for a PC and consoles. There is also VRR that runs up to 144 Hz at 4K and up to 240 Hz at Full HD. Samsung has also correctly implemented HGiG, so after performing HDR calibration on a console games are properly matched to the screen’s capabilities. This won't make the M80H any brighter, but at least it won't unnecessarily crush the brightest parts of the image. There's also a Game Bar for quick access to key settings and a Gaming Hub that lets you play in the cloud without a console. The M80H also offers Game Motion Plus, which creates additional frames and improves the smoothness of games running at 30 or 60 fps. Input lag then rises to around 59 ms, but is still roughly three times lower than with ordinary motion smoothing on TVs from other manufacturers. We wouldn't really recommend it for online gaming, but in more relaxed titles it can perform very well.