LG C3 77" OLED TV vs Samsung S90D OLED 4K Smart TV

These are very different OLEDs despite sharing the panel technology. The LG C3 is a 77-inch cinema set: four HDMI 2.1 ports, Dolby Vision, WebOS, and the size that makes OLED's per-pixel contrast pay off in a dark room. The Samsung S90D here is the 48-inch model: a brighter QD-OLED panel with an anti-reflection coating, 144Hz motion, and a slim design, but no Dolby Vision. Buy the LG for a large, dark-room movie setup with Dolby Vision sources. Buy the Samsung for a smaller, brighter room where glare and gaming refresh rate matter more than size.

• Choose the LG C3 if you want the biggest OLED picture for movies and Dolby Vision content in a room you can darken.
• Choose the Samsung S90D if you sit closer, fight window glare, and want 144Hz gaming with a brighter QD-OLED panel.