Samsung S90H Outshines LG C6 on Brightness, LG Hits Back in Real Scenes

Samsung's S90H mid-range OLED measured brighter than LG's C6 in lab testing, according to TechRadar, which pitted the two 2026 sets against each other. In Filmmaker Mode the S90H reached 1,689 nits peak HDR brightness, roughly 18% above the C6's 1,427 nits. Fullscreen HDR figures followed the same pattern, with the Samsung at 310 nits and the LG at 247 nits.

The publication noted that Samsung's OLEDs generally outshine LG's. Its flagship S95H and S99H recorded 2,739 nits in HDR Filmmaker Mode, about 10% more than the LG G6 at 2,475 nits.

Real-world viewing did not simply mirror the numbers. TechRadar used reference 4K Blu-ray material, including an early daytime desert sequence from Lawrence of Arabia, and found the C6 produced brighter-looking white sand than the S90H. That held in Filmmaker Mode and grew more pronounced when both televisions switched to their brighter movie presets, Cinema Home on the LG.

The reviewer suggested several possible reasons: the C6's Alpha 11 AI Gen 3 processor, which also appears in the G6 and adds a brightness booster plus 13-bit color processing, and the set's glossy panel versus the matte finish on the S90H.

Bright rooms flip the result. The C6's reflective screen, flagged as a weakness in TechRadar's earlier review of the set, showed mirror-like reflections in dark scenes. The S90H's OLED Glare Free coating handled dark footage from The Batman and Project Hail Mary well even under bright lab lighting, making it the stronger pick for well-lit spaces.

Color produced the closest contest. With The Super Mario Galaxy Movie, both sets reproduced the film's vivid palette well. In an early story-time sequence, the multi-colored Lumas looked richer on the C6 but more natural on the S90H, and the brothers' overalls split the same way, with the LG giving deeper reds and greens.

TechRadar described the C6 as a clear improvement on the C5, citing quicker operation, higher brightness and better color temperature accuracy that reduces the green cast seen on the older model.