LG C6 vs Samsung S90H: Which OLED TV Is Better in 2026?

LG C6 vs Samsung S90H: Two Excellent OLED TVs With Very Different Strengths

If you're shopping for a premium OLED TV in 2026, there is a good chance the LG C6 and Samsung S90H are both somewhere near the top of your list.

On paper, they look surprisingly similar. Both use self-emissive OLED technology, both offer excellent black levels, both support gaming at up to 4K 165Hz with a compatible PC, and both provide four high-bandwidth HDMI 2.1 ports.

Spend a little more time with their specifications and test results, however, and the differences become much more meaningful.

The LG C6 puts greater emphasis on HDR performance, image processing and Dolby Vision support. The Samsung S90H counters with its excellent Glare Free screen treatment, HDR10+ support and one of the strongest bright-room performances you'll find from an OLED.

There is another complication: screen size matters more than usual with both TVs. Certain C6 and S90H sizes use different panel technology, so a 48-inch or 77-inch version may not perform exactly like a 55- or 65-inch model.

If you want a deeper look at either television before deciding, read our full LG C6 OLED review and Samsung S90H review.

This comparison is an editorial analysis based on manufacturer specifications and published independent testing. TelevisionCafe has not conducted a direct hands-on side-by-side test of these two TVs. Specifications and available testing data were checked on September 19, 2026.

LG C6 vs Samsung S90H: Quick Verdict

If your priority is movies, HDR and overall home theater performance, the LG C6 has the stronger argument. Independent testing of comparable 65-inch models shows higher HDR brightness from the C6, and LG also supports Dolby Vision, something Samsung continues to omit.

If your TV sits in a bright living room with windows, lamps or other reflections facing the screen, the Samsung S90H becomes extremely compelling. Samsung's Glare Free matte treatment is much more effective at controlling reflections than the C6's screen.

Gaming is remarkably close. Both can reach 4K at 165Hz from a compatible PC, support VRR, FreeSync and G-SYNC, and provide four full-bandwidth HDMI 2.1 connections.

Picture Quality: Both Look Fantastic, but the C6 Has an HDR Advantage

At the most basic level, both TVs deliver exactly what people expect from OLED: individually controlled pixels, essentially perfect blacks and no traditional LCD-style blooming around subtitles, stars or bright objects against dark backgrounds.

Put either television in a dark room and the contrast can look spectacular.

The differences become easier to see once bright HDR content enters the equation.

Independent testing of the standard 65-inch versions found the LG C6 capable of noticeably stronger HDR brightness than the comparable Samsung S90H. That gives small highlights such as sunlight, sparks, lamps and reflections more intensity and can make high-quality HDR movies look more dynamic.

The Samsung is still a very capable HDR television, particularly with smaller bright highlights, but aggressive automatic brightness limiting can become more noticeable when large portions of the screen are bright.

This does not mean that every C6 automatically beats every S90H. As we'll explain later, certain 48- and 77-inch variants use significantly different OLED panel technology.

Dark-Room Movies: LG C6 Is the More Complete Home Theater TV

For movie nights with the lights turned down, the LG C6 is particularly difficult to ignore.

Both TVs provide the deep black level and pixel-level contrast that make OLED ideal for dark-room viewing, but LG combines that foundation with higher HDR brightness in the commonly compared 55- and 65-inch versions, excellent video processing and Dolby Vision support.

Dolby Vision remains widely available across major streaming services and Ultra HD Blu-ray releases, and the C6 can take advantage of its scene-by-scene or frame-by-frame dynamic metadata.

Samsung instead supports HDR10 and HDR10+. HDR10+ also uses dynamic metadata and can produce excellent results when compatible content is available, but Samsung still does not support Dolby Vision.

Bright-Room Viewing: This Is Where the Samsung S90H Fights Back

If your TV room has large windows, ceiling lights or lamps positioned opposite the screen, the Samsung S90H may be the more practical television even though the C6 can produce brighter HDR highlights.

The reason is Samsung's Glare Free screen treatment.

Rather than allowing bright objects in the room to appear as sharp mirror-like reflections, the S90H's matte surface diffuses them across a larger area. Independent testing found its reflection handling to be outstanding.

The LG C6 can get bright enough for normal daytime viewing, but its handling of direct reflections is considerably less impressive. A window directly behind your sofa, for example, is much more likely to become distracting on the LG.

This is a good example of why peak brightness numbers do not tell the entire story. A television that controls reflections effectively can sometimes look easier to watch during the day even when another model is capable of brighter HDR highlights.

Upscaling and Image Processing: LG C6 Has the Edge

Not everything you watch will be pristine 4K HDR, which makes video processing one of the most underrated differences between premium TVs.

The LG C6 uses LG's Alpha 11 AI Processor Gen3, a significant processor for a C-Series model. It handles upscaling, gradient reproduction and cleanup of lower-quality sources particularly well.

This matters when you're watching cable TV, older shows, YouTube videos or heavily compressed streaming content. No processor can turn a poor source into true native 4K, but good processing can make compression artifacts, rough gradients and soft edges considerably less distracting.

Samsung's NQ4 AI Gen3 Processor is also powerful and its 4K upscaling is very good. The difference is not dramatic with high-quality 4K content, where the source itself does most of the work, but LG has an advantage when the content becomes more demanding.

Sports: The Answer Depends on Your Room

Sports are an interesting case because the strengths of these TVs pull in opposite directions.

OLED's extremely fast pixel response means both televisions handle fast movement very well. Hockey, basketball, football and soccer can all look crisp, and the wide viewing angles are useful when several people are watching together.

The C6 offers strong processing and good brightness, but the S90H's Glare Free coating becomes extremely useful for afternoon games in bright living rooms.

If you mostly watch sports during the day with curtains open, we'd lean toward the Samsung. If you watch in a controlled-lighting environment and also care heavily about movies, the C6 becomes the more versatile option.

Keep in mind that very fast OLED response times can also make low-frame-rate movie content appear somewhat stuttery during slow camera pans. That characteristic affects both TVs and is common among modern OLED displays.