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, which allows for a very realistic image. Of course, none of them surpasses the magical thousand, however, the combination of such results along with unlimited contrast and black effectively boosts the visual outcome. The last of the scenes, featuring a fullscreen sun burst, is indeed less bright than the others, although it still represents a respectable level. It's also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will enable the achievement of exceptionally vivid colours.

The M80H is not one of the brightest TVs. Its peak brightness is around 350 nits, and we saw similar results across most of our test scenes. That's not enough to achieve truly striking HDR, as bright highlights lack punch and the overall image is a little too dim. In practice, HDR on the M80H feels more like well-presented SDR than noticeably more dynamic material with a wide brightness range. The picture can still look fine, but it's hard to point to strong highlights, clearly bright light sources, or an effect that immediately sets HDR apart from ordinary content.

Colours

One of the M80H's stronger points is its colours. The TV uses a PFS filter in the backlight, which lets it display a much wider colour gamut than a standard LCD without filters. Our measurements confirm this – the M80H covers about 96% of the DCI-P3 gamut and 72% of BT.2020. Those are very good results, which allow colours to be richly saturated. Samsung's positioning here is interesting. The M80H isn't part of the QLED family, even though in terms of colour it is practically on par with models carrying that badge. From an image quality point of view that doesn't make much difference – the colours are simply good.

The best factory mode implemented in the tested television was "Filmmaker". That was the one we used during all tests. This mode, in terms of colour reproduction, turned out to be quite decent, although other flaws effectively detracted from the enjoyment of the viewing experience. Starting with the most basic one, which is white balance, it was easy to notice that this was marked by a dominance of red, which completely altered the characteristics of the picture. We could see a strong yellowing of the whites and a shift of all colours to warmer tones. The gamma, which is a graph as equally important, if not more so, was quite severely reduced, resulting in a significant drop in contrast, except for the start of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Looking closely at films with a wide dynamic range, we can observe exactly the same phenomenon of white balance yellowing as in films with a standard colour palette. The EOTF curve, which replaces the gamma chart for us, is practically perfect and cannot be faulted.

Filmmaker Mode is pretty well set up out of the box, though it’s not perfect. In SDR material the most noticeable issue is an excess of red in the white balance, which makes the picture look a little warmer than it should. HDR content has a similar character. As for brightness response, in SDR the gamma stays close to the target value across most of the range. Small deviations are mainly visible in darker areas, which are in places slightly too dim. In HDR the very darkest details are slightly lifted, while from around 65% brightness the image starts to be gently darkened. This largely results from the way the TV controls its brightness. Overall, Filmmaker Mode looks 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 used them to model the picture in line with what the director envisioned. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates this is how a film should look. It's worth taking a look at the colour errors on the "ColorChecker" palette, where practically none of them exceed "1", except for two samples.

After calibration the M80H performs very well, especially with everyday SDR content. Regular TV, YouTube and movies watched without HDR can look very good on it. After adjusting the white balance the errors are small, though you can sometimes still see the TV tends to push the most saturated reds too far. You can also improve the picture in HDR and correct its main faults, but it doesn't reach the level of more expensive models. Samsung quite heavily restricts colour adjustment options in HDR, so in many areas we have to accept what the TV offers out of the box. Calibration can improve some parameters, but we can't change the M80H's overall picture character.

Once again, we will take a look at the feature responsible for gentle gradation, but we will also address the one that aims to enhance the quality of lower-quality materials. The default smoothing of tonal transitions, as we could see, was not the worst, but it can be improved further. The function has a slider that allows us to adjust its intensity. We recommend using the former, as it produces very good results and does not blur important details.

Image scaling on 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. While jagged edges of trees can be seen, it is not a major issue when compared to other manufacturers.

Although the M80H is positioned fairly low in Samsung’s line-up, the maker equipped it with one of its stronger processors, the NQ4 AI Gen2. The same chipset is used in Neo QLED TVs and the higher‑ranked S85H OLED. That’s good news, because the processor handles improving weaker sources really well. Upscaling is its strongest suit. Low‑resolution material is displayed properly and edges don’t look overly jagged. The TV won’t of course create details that aren’t in the source, but regular broadcast TV and older recordings look decent on it. One drawback is overscan, i.e. edge cropping, which can’t be completely turned off. The feature that smooths tonal transitions, the so‑called noise reduction, also works well. The processor can effectively reduce visible signs of heavy compression, but it doesn’t do so without side effects. At higher settings it can smooth the picture too much, remove some fine detail and even eliminate film grain. For that reason we recommend using this feature mainly for material that genuinely suffers from heavy compression and posterisation.

The maximum refresh rate we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the TV to a very powerful PC. Otherwise, we will operate at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sports or content with a lot of motion dynamics. For those who require high fluidity of the image, the manufacturer has implemented a multi-level 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 in the range of 0 to 10, with each degree affecting the level of smoothing, allowing everyone to find their sweet spot.

The panel of the LG OLED C4 features an average response time of less than 1 ms (which directly results from our measurements), enabling the achievement of an extremely clear image, unattainable for LCD TVs, which can have response times of up to several milliseconds. This is clearly evident in the images from the "UFO Test," which show no trailing blur behind the object.

The M80H performs very well for watching sport and for gaming. The TV is equipped with a panel offering a refresh rate of up to 144 Hz at 4K, and when the resolution is reduced to Full HD it can handle up to 240 Hz. That second option will be used mainly by PC gamers.

The panel also handles 120 Hz content well, which matters especially for console gaming. A high refresh rate is also useful when watching sport, and motion blur is relatively low. That's important because VA panels are not known for the best performance in this area. On the M80H, fast-moving objects do not produce a very noticeable blur.

We can now say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of cooperation with consoles and PCs. Thanks to the implementation of four full-bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has embedded all the features that enhance gaming comfort, including simultaneous support for FreeSync and G-Sync technologies. With such a tandem, players with graphics cards from AMD or nVidia can safely choose C4. However, what should please gamers demanding the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The former is particularly important as it operates with extremely low input lag in all settings.

A standard feature in televisions from the Korean manufacturer is also the implementation of GameBar, allowing for quick adjustments of settings "on the fly," without the need to exit the game. It also allows for image adjustments for people with visual impairments, which is an incredibly nice touch. Another important piece of information is that when VRR technology is enabled, we won’t experience a drop in contrast. This is, of course, due to the design of the panel and the absence of conventional backlighting. It is, however, 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 the manufacturer's OLEDs equipped with high-refresh-rate panels and HDMI 2.1 connections, creates a harmonious whole with consoles. In practice, it is a complete television, and if we expect the highest possible efficiency 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 pretty much the same as Samsung’s much more expensive TVs. All three HDMI inputs support HDMI 2.1, so even if one is taken by a soundbar connected via eARC there’s still room for a PC and consoles. There’s also VRR up to 144 Hz in 4K and up to 240 Hz in Full HD. Samsung has correctly implemented HGiG as well, so after performing HDR calibration on the console games are properly matched to the screen’s capabilities. That won’t make the M80H any brighter, but at least it won’t unnecessarily wash out the brightest parts of the image. On top of that there’s 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 includes Game Motion Plus, which generates extra frames and improves the smoothness of games running at 30 or 60 fps. Input lag then increases to around 59 ms, but is still about one third of what you’d see with typical motion smoothing on other manufacturers’ TVs. We wouldn’t really recommend it for online multiplayer, but it can work very well in slower‑paced titles.