LG OLED G4 vs Sony Bravia 9 (XR90)

The LG G4 excels in delivering an incredibly vivid HDR experience, positioning it as one of the best models in its class. Equipped with second-generation Micro Lens Array (MLA) technology, it achieves a remarkable peak brightness of 1474 nits in real-world scenes. While it may not match Mini LED-backlit LCD TVs in full-screen white scenes, the overall performance is outstanding. The fine details in HDR content shine brightly, a distinct advantage of OLED technology over non-OLED displays. With this impressive brightness and wide DCI-P3 colour gamut coverage, HDR content is brought to life with unmatched engagement and immersion.

The brightness performance of the Sony Bravia 9 is exceptional. Each scene reaches over 1500 nits, and the television can shine even brighter during movie playback. This level of brightness provides an extraordinary viewing experience, allowing for immersive interaction with high-quality video content. Thanks to its extensive coverage of the DCI-P3 colour gamut, the image is vibrant, and when combined with such high luminance, it almost feels alive. With its impressive peak brightness, viewers can fully appreciate the colour range, even in the most challenging scenes involving dynamic lighting changes. The Bravia 9 also supports Dolby Vision and HDR10 formats, further elevating the viewing experience.

Before calibration, the "Filmmaker" mode on the TV had a noticeable red and green colour dominance, resulting in a warm-yellow hue across both SDR and HDR content. This warm tone, typical of modes like "Cinema" and "Filmmaker," led to a yellowish cast that was evident when switching from the "Standard" mode.

Looking at the brightness characteristics, the Gamma chart showed decent performance for mid-tones and bright whites, but it struggled with the darkest details, which tended to merge into a black blob. HDR content, as represented by the EOTF curve chart, displayed a drop in contrast due to excessive brightness, which overshadowed fine details and negatively affected the overall image quality. Additionally, the "ColourChecker" chart revealed that colours were under-saturated, contributing to a less accurate and vibrant visual experience.

This provided a good foundation to build on, but calibration was needed to bring out the full potential of the "Filmmaker" mode and address these issues.

The "IMAX Enhanced" factory mode has remained the best option in Sony televisions for years, and it was used throughout the entire testing process. While it aligns closely with the reference compared to other predefined settings, improvements could be made for a better viewing experience.

In SDR materials, the gamma shows a noticeable boost, which leads to over-contrasting the image. Additionally, the beginning of the graph deviates significantly from the reference, resulting in merged details in the darker areas, creating an unpleasant uniform blotch. The EOTF curve in HDR content, on the other hand, appears mostly correct, with only minor deviations from the reference.

However, the most prominent issues affect the white balance. There is a persistent green colour dominance, leading to problems with grey tones and overall colour misalignment. This imbalance in the white balance gives the image an unwanted greenish tinge, negatively impacting the overall visual quality.

The manufacturer has been offering extensive support for the calibration process in its LG televisions for many years. Therefore, we used 2- and 20-point grayscale adjustments along with an advanced CMS (Colour Management System) to optimise the display. As shown, the calibration procedure greatly improved each parameter. The results included studio-quality colour reproduction, enhanced detail in dark areas, corrected brightness characteristics, and accurate colour saturation. This led to a near-perfect match with the reference image—the one the film director saw on the preview monitor. It’s also worth mentioning that LG G4 televisions are unique in offering even deeper image adjustments through 3D LUT matrices, a feature primarily suited for post-production or graphics studios.

The colour reproduction after the calibration process on the Sony Bravia 9 is nothing short of excellent. Regardless of the signal, whether SDR or HDR, the image comes remarkably close to the director's intended vision. Nearly every flaw in the image has been meticulously modelled and corrected to a high degree.

This impressive result can be attributed to the advanced tools available for calibration, which Sony has been offering in its televisions for years. Notable tools include the 2- and 20-point grayscale calibration and a very comprehensive CMS (Colour Management System). These features allow for precise adjustments, ensuring that the colours and overall image quality are as accurate and faithful to the source material as possible.

The LG G4 does not perform well with materials rich in tonal transitions, leading to a pronounced posterization effect. However, the manufacturer has included a smoothing system called "Gentle Gradation," with three levels: Low, Medium, and High. These settings are effective at smoothing bright colours, though less so for darker tones. It is recommended to use the Low setting, as the higher levels can distort the director's intentions by removing film grain.

When it comes to upscaling lower-quality material, the television's performance is quite good, delivering a sharp and clear image. However, attention should be paid to the jagged edges of fine details and the occasional halo effect around figures. This occurs due to the sharpening imposed by the LG G4, even when the lowest setting is selected (0). This is a noticeable change from the LG G3, which did not apply such strong sharpening, even at setting 0.

When analysing the quality of tonal transitions and image scaling, especially for lower-quality materials, the improvement after activating the function for tonal transitions is clear. By default, the quality is quite average, but once the function is turned on, even at the lowest setting, the results are among the best we've seen. This feature can be enabled without worrying about negative side effects, such as film grain blur.

Sony's "XR" processor, which the brand has been touting for several years, lives up to its reputation for image scaling. The image quality is incredibly sharp while maintaining a very natural look. This reinforces that Sony's processing technology is one of the best available, particularly when handling lower-resolution content.

The LG G4 offers a maximum refresh rate of 144 Hz, achievable when connected to a powerful PC. For most users, however, the TV operates at a maximum of 120 Hz, ideal for watching sports or other content with fast motion. To improve image fluidity, the television includes the "TrueMotion" motion smoothing system, which features two separate sliders: De-Blur (for the sharpness of moving images) and De-Judder (for judder reduction). These sliders allow users to adjust the level of smoothing between 0 and 10, ensuring everyone can find the ideal setting.

With a response time of 0.78 ms, the LG G4 delivers exceptionally clear images, outperforming LCD televisions, which can have much slower response times. This results in no trailing blur behind moving objects, as shown in the "UFO Test." The TV also provides precise control over motion smoothing, which is especially beneficial during fast-paced video game sequences. Thanks to OLED technology, the G4 eliminates ghosting, ensuring a crisp and clear image even during the most dynamic sports or action scenes.

The maximum refresh rate of the Sony Bravia 9 is 120 Hz, the minimum for those primarily watching sports or other high-motion content. This refresh rate ensures the image remains sharp and smooth, even during fast-paced scenes. For more demanding users, Sony has implemented an advanced motion smoothing system, divided into three distinct segments: Smoothness (Film), Smoothness (Camera), and Clarity. These settings can be adjusted to various degrees, allowing users to fine-tune the picture to their preferences. For example, a setting with slight smoothing can be used to avoid the "soap opera effect," delivering a more natural and cinematic viewing experience. This level of customisation ensures that viewers can find their ideal balance between smoothness and clarity.

The LG G4 TV supports all the features encompassed by the HDMI 2.1 standard, making it a gaming powerhouse. During testing, every feature activated seamlessly, ensuring a smooth experience for both console gamers and PC users. Notably, the HGIG mode (HDR Gaming Interest Group) is implemented correctly, allowing games mastered to brightness levels higher than the TV’s maximum luminance to map tones accurately, preserving the game’s original visual integrity.

A notable highlight is the dedicated GameBar, which can be accessed at any time to quickly check or adjust game settings. More importantly, enabling VRR (Variable Refresh Rate) does not compromise contrast—a common issue in TVs with local dimming or Mini LED backlighting. This is thanks to the OLED panel’s self-emissive pixels, which maintain consistent contrast. However, a slight grey flicker may appear when VRR is enabled, though this is standard across OLEDs.

In summary, the LG G4, like most OLED TVs, is ideal for gaming and online competitions. Its HDMI 2.1 ports offer a full 48 Gbps bandwidth, supporting features such as VRR, ALLM (Auto Low Latency Mode), G-Sync, FreeSync, and HDR Dolby Vision gameplay, ensuring an exceptional gaming experience.

The Sony Bravia 9 television is equipped with four HDMI ports, but what is puzzling for a device of this class is that only two of them operate in the 2.1 standard. Despite this, it should not detract from the fact that nearly all features work excellently, providing a positive experience when using them. Games running in HDR10 or Dolby Vision benefit from low input lag, ensuring a comfortable gaming session. The solid implementation of the HGIG mode is a noteworthy feature, as, after proper calibration, it closely aligns with Dolby Vision.

Sony introduced the GameBar feature to its televisions last year, a standard for many manufacturers. This feature allows for quick adjustment of settings without exiting the game. Its implementation has been seamless, offering conveniences such as a crosshair grid, black level adjustment, and reducing the screen to gaming monitor proportions.

The Sony Bravia 9 will find its fans, particularly among PlayStation enthusiasts. It is a natural pairing since the console and the television share identical capabilities. However, more broadly speaking, despite the minor issues with Dolby Vision in games, the Bravia 9 remains a very good television for gaming overall.