On what both rows record, these two are level: a 55-inch class screen, an OLED panel and 4K UHD resolution, all manufacturer-stated on both sides. Everything past that is on the LG row only — a 165 Hz refresh rate as LG's product page states it, VRR with G-Sync Compatible and FreeSync, Dolby Vision, Filmmaker Mode, Dolby Atmos and webOS — and our Samsung row records none of those fields at all, which is a gap in our data and not a missing feature. If one of those features is the reason you are shopping, the OLED55C6 is the one this page can confirm it on; check Samsung's own spec sheet before reading the QN55S90H's blanks as a no. Picture quality is not ranked here: neither row records a measured brightness, contrast or colour figure.
LG's OLED55C6 and Samsung's QN55S90H are both 2026 55-inch OLEDs, and they line up closely on paper: same screen class, same 4K resolution, both OLED. What separates them on this page is how much each row records. Our LG row carries ten manufacturer-stated fields from LG's product page; our Samsung row carries three, all from Samsung's product-page title. That limits what can honestly be ranked, and the page says where.
Specifications · side by side · per-field provenance
● SOURCE-TRACKED
Spec
LG OLED55C6PUA
Samsung QN55S90HAEXZA
Price
$1,300
$1,300
Brand
LG
Samsung
Screen size (in)
55
55
Panel type
OLED evo
OLED
Native resolution
4K UHD
4K UHD
Native refresh rate (Hz)
165
not stated
Dolby Vision
Yes
not stated
Filmmaker Mode
Yes
not stated
VRR support
Yes
not stated
VRR types
GSync Compatible, FreeSync
not stated
Dolby Atmos output
Yes
not stated
Operating system
webOS
not stated
Shaded rows differ · green dot = lab-measured · amber = manufacturer-verified · blue = retailer/community-reported · grey = estimated · “not stated” means exactly that
Reading the numbers honestly
Every field on both rows is manufacturer-stated, so nothing here is a retailer or an inference — but the two rows are very different sizes. Our Samsung row records exactly three fields: a 55-inch class screen, an OLED panel and 4K UHD resolution. Our LG row records those three (its panel type written as OLED evo) and seven more: a 165 Hz refresh rate as LG's product page states it, VRR with G-Sync Compatible and FreeSync named, Dolby Vision, Filmmaker Mode, Dolby Atmos and webOS. A blank on the Samsung row is our silence, not a Samsung no: we have no refresh-rate, HDR-format, gaming, connectivity, audio, dimension or VESA field on file for it, so none of those can be compared from this page. Neither row records a peak-brightness figure, a measured contrast or colour figure, an HDMI port count or a mounting pattern.
Compatibility · computed, not written
Checked as the display leg behind a popular budget receiver, the Denon AVR-X1800H: Denon AVR-X1800H
Does the LG OLED55C6PUA keep VRR through a receiver like the Denon AVR-X1800H?
LG OLED55C6PUA supports VRR and the Denon AVR-X1800H passes VRR through — the variable-refresh chain holds with a console wired through the receiver.
Does the Samsung QN55S90HAEXZA keep VRR through a receiver like the Denon AVR-X1800H?
Samsung QN55S90HAEXZA does not list VRR support, so receiver passthrough is moot for it.
Computed from the catalog's normalized fields — the same fields the builder's compatibility engine reads. A missing field reads as "can't check", never as a pass.
On what both rows record, these two are level: a 55-inch class screen, an OLED panel and 4K UHD resolution, all manufacturer-stated on both sides. Everything past that is on the LG row only — a 165 Hz refresh rate as LG's product page states it, VRR with G-Sync Compatible and FreeSync, Dolby Vision, Filmmaker Mode, Dolby Atmos and webOS — and our Samsung row records none of those fields at all, which is a gap in our data and not a missing feature. If one of those features is the reason you are shopping, the OLED55C6 is the one this page can confirm it on; check Samsung's own spec sheet before reading the QN55S90H's blanks as a no. Picture quality is not ranked here: neither row records a measured brightness, contrast or colour figure.
A stated gaming refresh rateLG OLED55C6PUA — 165 Hz on LG's product page, with G-Sync Compatible and FreeSync named; our Samsung row records no refresh-rate or VRR field, which is a blank rather than a no.
Dolby Vision titlesLG OLED55C6PUA — Dolby Vision is manufacturer-stated on the LG row; our Samsung row records no HDR-format field at all.
Filmmaker ModeLG OLED55C6PUA — Manufacturer-stated on the LG row; not on file for the Samsung.
Screen class and resolutionEither — Both rows state a 55-inch class 4K UHD OLED, manufacturer-stated on each side.
Picture qualityEither — Neither row records a measured brightness, contrast or colour figure, so nothing here ranks the two pictures.
Planning a wall mountEither — Neither row records dimensions, a weight or a VESA pattern.