LG OLED G5 vs Samsung S90H (WOLED)

LG G5 with its new Tandem OLED panel brings the biggest change in terms of TV brightness. And it’s substantial. This is a truly astronomically bright OLED. In every scene tested – whether it's point lights or full-screen whites from the movie The Meg – brightness on the G5 exceeded 2000 nits. Just a year ago, such values on an OLED were simply unimaginable. And here we are – the G5 is approaching, and at times even surpassing, the best Mini-LEDs on the market. A novelty in the Tandem OLED panel is also the expanded colour gamut coverage – and here the LG G5 performs almost perfectly. DCI-P3 achieves a full 100%, while BT.2020 hovers around 83%. These are some of the highest values currently available on the market – it's hard to find any other TV that comes close to such results, unless we're talking about the best displays with QD-OLED panels. The G5 has almost reference-level HDR quality – both in terms of brightness and colour saturation. This is an OLED that can truly shine – and not just metaphorically.

The Samsung S90H in the WOLED variant is still an exceptionally bright TV for its price bracket, although it is slightly dimmer compared with the QD-OLED version. That difference is not as pronounced as in last year’s F series, where gaps sometimes reached 500 nits. Here the parameters of both panels are very similar, with differences in peak brightness of only about 100–150 nits. In small-window measurements the S90H with the WOLED panel easily reaches close to 1,500 nits. That headroom lets it phenomenally convey the dynamics of HDR effects — blooms, light reflections and explosions have the right punch, exactly as intended by the studio creators. As with most OLED displays, when a very bright scene fills the entire screen, panel protection systems kick in and brightness naturally falls to around 700 nits. It’s worth stressing that this is still an excellent result on the market, often noticeably better than many Mini LED screens in the same segment.

Colour gamut coverage

The biggest difference between the two S90H variants lies in colour reproduction and saturation. This stems directly from the different construction of the WOLED panel, which uses an additional white subpixel. As a result, very high-brightness colours don’t achieve quite the same saturation, and the wide-colour volume is slightly more limited than with QD-OLED. That said, in everyday use these differences will be hard for most viewers to notice. Our measured DCI-P3 coverage on the WOLED panel reaches almost 99%, meaning that for the vast majority of real film scenes both variants will present an almost identical image. The real gap only appears in rarer, especially demanding productions that use the ultra-wide BT.2020 gamut. Because of the WOLED panel’s construction, coverage of that standard is roughly 15% lower compared with the S90HAT with a QD-OLED panel, so the brightest, heavily lit HDR colours may appear a touch less vivid.

Our test unit LG G5 had some issues in the factory Filmmaker mode. While the picture might have seemed fine to most people, we knew this TV could do much more. This mode had a noticeable excess of blue tint in the white balance, resulting in a strongly cooled image – especially in HDR modes, where there was additionally a lack of red. The image appeared cold, and its sharpness was artificially boosted and unnatural. Another significant problem was the brightness characteristics. In SDR content, the situation wasn't the worst, aside from a slight dimming of the entire image. However, it fared much worse in HDR materials – due to improper brightness management, the smallest details could completely disappear from the image, while larger, bright elements looked overexposed and lacking in gradation. Fortunately, the G5 supports calibration using 3D LUT (a professional tool for colour calibration), so we decided to take advantage of its professional capabilities and see what it was really capable of. Because while it wasn't terrible even before calibration, the potential of this TV definitely deserved more.

In Filmmaker mode, which we strongly recommend switching on straight out of the box, the S90H offers very good factory colour tuning. Colours are natural and faithful to the creators' intent, without the annoying oversaturation seen in more aggressive profiles. However, as is often the case without full calibration, there is unit-to-unit variation. In our test the white balance was a little deficient in the blue component, so the image leaned slightly towards warmer, yellowish tones. This was most noticeable in bright scenes, such as the snowy sequences from Star Wars. Additionally, the gamma curve was slightly low at around 2.2, which caused a small lift in shadow detail. In HDR mode the tuning was a bit better, showing only a slight undersaturation in the red region.

After completing the calibration process with professional tools, we can confidently state this – the LG G5 offers almost reference-quality image. Most of the errors related to white balance and the ColorChecker test are below a value of 2, which is a phenomenal result, practically imperceptible to the human eye. And while one could still nitpick that in HDR films the TV still has a tendency to slightly dim the smallest elements of the image, in practice this does not negatively affect the overall reception. Hats off to LG, as once again they provide users with enormous display settings options – and this, combined with very good parameters of the panel itself, results in an image that is truly hard to beat.

After full calibration, you can safely say the S90H in the WOLED version looks almost perfect. In SDR mode colour errors fall to ultra-low levels and Delta E values very rarely exceed 2. That's a phenomenal result, so if perfectly faithful colour reproduction matters to you, it's definitely worth getting it calibrated. The calibrated HDR mode also performs very well, where the white balance was stabilised and previous deviations eliminated. After professional tuning it's really hard to fault anything, because the TV delivers an image with almost exemplary naturalness and three-dimensionality. The slightly lower score in this category compared with the QD-OLED variant is solely due to the saturation limitation in extremely bright scenes, while the tuning potential and colour fidelity are at the highest level.

Upscaling and digital image processing in the LG G5 performs very well. The television handles lower quality content excellently, especially when the "Smooth Gradation" feature is set to a low level. In this mode, it effectively removes undesirable artifacts and issues with visible tonal transitions. It may also slightly smooth out some desirable details, like the subtle texture of clothing or skin, but importantly – it does not remove film grain, so it's hard to talk about a serious compromise here. This is one of those options that is actually worth turning on.

The G5 also does well with upscaling, which is improving the quality of older materials. The test image with the model looked really solid – slight jaggedness was visible, but that's an effect that can't be completely avoided. On the plus side, there were no overscan issues, which – contrary to appearances – is not obvious, even in 2025.

When it comes to banding reduction itself, Samsung has kept the same solutions known from last year’s models. The dedicated gradient-smoothing function works quite well and can effectively mask unwanted tonal transitions, which can be useful on a WOLED panel that’s somewhat more prone to banding. However, it’s important to remember it acts aggressively. This mechanism, aside from the artefacts themselves, can remove fine film grain and subtly soften detail. Ultimately it’s a trade-off, but if you want perfectly faithful image reproduction, it’s safer to leave this option off.

There’s also no breakthrough in scaling. The S90H uses the same NQ4 Gen3 processor as its predecessor, so upscaling quality was almost identical. The chip sharpens lower-resolution material very well, pulling a satisfying level of detail out of it. However, Samsung still hasn’t solved the old overscan problem. For some older recordings or archival footage the edges of the image can be slightly cropped. It’s a minor drawback, but it’s a shame the manufacturer still hasn’t fixed it.

The motion smoothness on the LG G5 is simply phenomenal. The television is equipped with a panel featuring a 165 Hz refresh rate, and this combined with the instantaneous response time of the OLED matrix delivers incredible results. The image doesn’t judder or blur like on traditional LCD televisions. Like most LG models, the G5 comes with a motion smoother, which can be handy when watching movies – we’re talking about the TruMotion mode, of course. With the “De-Blur” and “De-Judder” sliders, we can adjust the smoothness of older materials according to our own preferences, whether we want to maintain the characteristic film jitter or lean towards a more fluid, television-like effect.

When it comes to motion handling the S90H is simply excellent. This year's panel offers its refresh rate boosted to 165 Hz, although in practice the benefit will mainly be for gamers connecting a powerful PC. For movies, TV series or sports broadcasts such a high refresh rate makes no difference and the picture looks exactly the same as at the standard 120 Hz. Regardless of the source, the OLED panel's lightning-fast response time does the job. Motion is clean, and the ghosting or smearing seen on LCDs simply doesn't occur here.

Features for gamers? Perfect. That should be enough for you to know what level we’re dealing with here. The G5 is a TV designed for gamers, so you'll find literally everything you might expect from a gaming screen. There's Game Bar, support for high resolutions with high refresh rates - that is, 4K at 120 Hz, and even more, as the panel has a refresh rate of 165 Hz (which PC gamers will benefit from). The TV supports variable refresh rate (VRR), automatic low latency mode (ALLM), and also properly handles HDR in games thanks to the HGiG feature. All of this adds up to one of the best gaming feature sets available on the market. Well done, LG.

Gamers should feel right at home with the S90H, because Samsung has left few reasons to complain in this area. The TV has four HDMI 2.1 ports, each supporting VRR, ALLM and high refresh rates. There's also the Game Bar, a handy menu that lets you quickly check key parameters and change settings without leaving the game. Importantly, Samsung has also improved HGiG. In last year's models it could cause issues when used with a console, but on the S90H it now works as it should. What really stands out against the competition is Game Motion Plus. It's a specialised motion-smoothing mode for games that works best with titles running at 30 or 60 frames per second. Motion becomes noticeably smoother and latency remains at a reasonable level. In our measurements it was under 50 ms, so gaming is still comfortable. That's important, because on many TVs enabling a similar smoothing feature causes such a big increase in input lag that controls become noticeably sluggish. Samsung has managed to find a good compromise here. There's still no Dolby Vision Gaming, but in practice Game Motion Plus may prove to be the more useful feature.