LG - C5 OLED 55 vs Samsung - S90F QD-OLED 65

The S90F QD-OLED 65 edges ahead on the Mars Score (60.5 vs 64.5), but the 4.0-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the C5 OLED 55 if you care most about dolby vision and smart os. The biggest gaps in its favor are dolby vision, smart os.

Pick the S90F QD-OLED 65 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are screen size, peak brightness, panel type.

Both ship with comparable refresh rate, hdmi 2.1 ports, vrr, so those specs don't separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.