LG OLED G4 vs Sony Bravia 7 (XR70)

LG G4 guarantees an incredibly vivid HDR effect, placing the television among the very best. The equipment of the highest model in the producer's 2024 portfolio with the second generation of micro-lens technology (MLA) has achieved a maximum brightness level of 1474 nits in real scenes. The only area where the product from the Korean manufacturer may lag behind LCD televisions with Mini LED backlighting is during the full-screen scenes featuring a lot of white. If we disregard the latter type of scene, the average result would be even higher. It is also worth mentioning scenes with very fine details, where each one shines at full intensity, which is not as evident in non-OLED televisions. The combination of such brightness and wide coverage of the DCI-P3 palette makes HDR materials more engaging than ever before.

Since we know that the television handles contrast well, let's check how it performs in terms of HDR effects. The luminance graph shows the very high capabilities of this model – 1500 nits is a truly impressive result. The HDR effects are particularly striking in scenes where most of the screen is covered in light, such as in scenes 1, 3, and 5 of the test. Minor shortcomings, typical of this technology, are still visible with very small light effects, as in the scene from the film "Sicario 2," where brightness drops to 500 nits. Although these are not stunning results, they can be considered decent. Additionally, it is worth praising the television for its high coverage of a wide colour gamut – DCI-P3 at 96%, which allows for vibrant, saturated colours.

The best factory mode in terms of colour reproduction was "Filmmaker". This was the one we used during our tests. Let's check how its characteristics looked before the calibration process. Looking closely at the white balance first, we can notice a significant dominance of red and green. As a result, the image had a warm yellowish hue. Such characteristics are typically observed in "Cinema", "Filmmaker" or similarly named modes. The effect of this colour balance was clearly visible in both SDR and HDR content, which after switching from "Standard" mode appeared distinctly yellow. Now, let's move on to two graphs that are responsible for the brightness characteristics and consequently the contrast of the image. The first one (Gamma), representing materials with a standard colour palette, performed decently. For most of the time, midtones and bright whites were reproduced very accurately; however, it noticeably lost the darkest details, which merged into a black blob. Conversely, HDR materials, represented by the EOTF curve graph, exhibited a significant drop in contrast due to a strong boost in brightness. The colours themselves also posed a problem, as can be seen on the "ColorChecker" graph, since they were noticeably under-saturated.

The IMAX Enhanced mode on the Sony BRAVIA 7 television is undoubtedly the best mode available on this model, although it is not without its flaws, as its name might suggest. The biggest issue is the white balance – both in HD and 4K HDR content, there is a clear dominance of red, which causes the image to take on pink hues. This is particularly noticeable on the tested snow pattern, where the pinkish tint becomes very apparent. Errors in the Colour Checker test also confirm these deviations – although they are not catastrophic, there is a tendency to drift towards warmer colours. As for brightness performance, the gamma remains at a decent level with a slight peak but without major issues. However, the biggest challenge comes from 4K materials. It is clear that the EOTF curve is significantly above the reference graph, which causes the image to become overly brightened.

The manufacturer has implemented extensive support for the calibration process in its LG televisions for many years. We therefore used 2- and 20-point greyscale adjustments, as well as an advanced CMS (Colour Management System), and got to work. As you can see, thanks to the procedure carried out, each parameter has significantly improved. The use of tools allowed for the achievement of extremely beneficial effects, which include: studio colour reproduction, recovery of details in dark areas of the image, appropriate brightness characteristics, and suitable colour saturation. This brings us as close as possible to the reference image, which is what the film director saw on the preview monitor. It is worth noting that the LG G4 televisions alone allow for even deeper intervention in image quality thanks to the ability to calibrate with 3D LUTs. However, this is a solution recommended only for post-production or graphic studios.

Sony BRAVIA XR70 offers a wide range of tools that allow for adjusting the picture to individual preferences, enabling us to make significant adjustments to the settings. The white balance has been free from the problem of red colour dominance – snow no longer takes on pink shades, which was previously noticeable. Although one can detect slight deviations in the final part of the white balance graph, concerning a drop in blue colour, they are acceptable and difficult to notice in everyday use. The Colour Checker test confirms that errors in colour reproduction are no longer as pronounced and rarely exceed a value of 2, which is a very good result. As for brightness, gamma, while not requiring much improvement, was slightly adjusted. The most significant change was noted in the EOTF curve – the television no longer has issues with excessively brightening the entire image in 4K material. However, upon closer analysis and the inclusion of EOTF characteristics in film material, some limitations of the television become apparent due to the previously discussed dimming algorithm. Some small elements may be slightly more brightened, but these errors are so minor that most users will not notice them. Overall, the calibration results are very, very positive.

The tested television did not perform particularly well with materials rich in tonal transitions, as a result of which we could observe a strong posterisation effect. However, there is a partial remedy for this issue. The manufacturer has equipped the LG G4 with a smoothing system called "Gentle Gradation," which we can apply at three levels: Low, Medium, and High. Each of these options guarantees quite a high effectiveness of smoothing on light colours, although it is low on darker ones. We recommend primarily using the first one, as the other two interfere with the director's intentions by removing film grain.

When watching lower-quality materials, the efficiency of the television during upscaling is extremely important. The image from the tested television is sharp and clear. However, one should pay attention to the jagged edges of fine details and minor issues around characters, such as the creation of halo effects, which occurs due to the sharpening imposed by LG G4 even when the lowest value on the slider, that is 0, is set. It is worth noting that this represents a certain change compared to the LG G3, which did not impose such strong image sharpening, even when the appropriate slider was set to position 0.

Since we know that the television performs very well with high-quality materials, it is worth checking how it fares with lower-quality content. Here, the television shows its potential, and the applied graphics processor works really brilliantly. On the test screen with the light bulb, there are no issues with colour transitions, and the smooth gradation feature works very well – we recommend setting it to "Medium".

As for digital processing, or so-called upscaling, the television sharpens the image quite noticeably, which leads to slight aliasing, for example, on the branches in the background, but it does not remove desirable details. Nevertheless, the overall appearance is really appealing and may be to the taste of most users. However, if we prefer a softer, more plastic image, this effect can be reduced in the settings by adjusting the sharpening level according to personal preferences.

The maximum refresh rate that we can set on the LG G4 is 144 Hz. Naturally, this is only possible when the LG G4 is connected 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 high motion dynamics. For those requiring high image fluidity, the manufacturer has implemented a multi-level motion smoother called "TrueMotion". This 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 from 0 to 10, with each level affecting the degree of smoothness, allowing everyone to find their golden mean.

The LG OLED G4 panel features an average response time of 0.78 ms (as directly derived from our measurements), enabling an incredibly clear image, unattainable by LCD televisions, which can have response times of several milliseconds. This is perfectly illustrated by the images from the "UFO Test", which show no trailing blur behind the object. Moreover, the LG OLED G4 test revealed that the television offers the ability to precisely adjust the motion smoothing function, allowing users to select the ideal level of image interpolation. We particularly appreciated this during fast-paced actions in video games, where the LG G4 performed exceptionally well, minimising any blurring. Thanks to OLED technology, this model eliminates so-called ghosting, ensuring that the image remains sharp even in the most dynamic sporting or cinematic scenes.

The Sony BRAVIA 7 television with a 120 Hz display will satisfy most users in terms of motion smoothness. Additionally, Sony offers the Motion Flow feature, which allows for the selection of three different picture settings, tailoring them to individual preferences: Smoothness – Film: This setting enhances motion smoothness, giving the image a more cinematic or theatrical quality. Smoothness – Camera: This setting provides even greater smoothness, useful when watching dynamic scenes such as sports broadcasts. Clarity: This setting focuses on minimising noise and motion artifacts, resulting in a more stable and clear image.

The LG G4 television supports all the features that make up the HDMI 2.1 standard. During testing, each of them activated without the slightest problem, which allows us to consider the television as designed for gaming. Their functionality will surely be appreciated by both console users and those connecting the LG G4 to a computer. It is also worth mentioning the correct implementation of the HGIG (HDR Gaming Interest Group) mode, which ensures that games mastered to brightness levels exceeding the maximum luminance of the LG G4 will correctly map tones, and the game's visuals will remain true to the original.

A nice touch is the existence of a special GameBar, which we can call up at any moment to check game parameters, but most importantly, to change them quickly. More importantly, enabling VRR technology does not degrade contrast, which is very common in televisions that feature local dimming or Mini LED backlighting. Of course, this is thanks to the OLED panel itself, characterised by pixel self-emission. As a matter of editorial obligation, we will only mention a slight grey flicker, which is somewhat normal after enabling VRR.

In summary, the LG G4, like practically all OLED televisions, is an ideal product for all kinds of games and online competitions. With fully-fledged HDMI 2.1 connections with a full bandwidth of 48 Gbit, features such as VRR, ALLM, G-Sync, FreeSync, or gaming in HDR Dolby Vision will bring much joy.

Sony Bravia 7 has significantly improved its capabilities for working with consoles compared to earlier models. The television supports variable refresh rate (VRR), which eliminates the tearing effect, and is compatible with graphics cards, ensuring smooth display. The auto low latency mode (ALLM) effectively reduces input lag, which is crucial in dynamic games. Dolby Vision with low latency additionally provides impressive HDR effects that look great during gameplay.

Sony Bravia 7 also offers a Game Bar feature, which allows quick access to settings and monitoring parameters while gaming. An interesting option is the ability to enable a virtual on-screen crosshair, which can provide a slight advantage in shooter games. Nevertheless, compared to the Bravia 9 model, the HGIG feature in the Bravia 7 does not perform as well, which may be noticeable for more demanding gamers – especially as the HGIG mode is becoming increasingly popular among players as the preferred method for reproducing HDR effects.

A drawback is the lack of support for 1440p@120 Hz resolution, which could make gaming easier for users with less powerful graphics cards. Furthermore, the Sony Bravia 7 is equipped with two HDMI 2.1 ports, one of which is often used to connect an audio system via eARC, limiting the available connections for new generation consoles.