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LG C5 Series OLED evo 4K TV vs Samsung S90D 42" OLED TV

These are very different TVs for different rooms. The LG C5 is a 77-inch OLED with the Alpha 9 Gen8 processor, four HDMI 2.1 ports, 144Hz VRR and Dolby Vision, and owners rate it 4.8 out of 5. The Samsung S90D is a 42-inch OLED with 120Hz, four HDMI ports and Alexa and Google Assistant built in, rated 4 out of 5. Buy the LG for a main room and film and console gaming; buy the Samsung for a bedroom, desk or small apartment where 77 inches will not fit.

  • Choose the LG C5 if you have the wall space for 77 inches and want the brightest, most feature-complete OLED for movies and gaming.
  • Choose the Samsung S90D if you need a compact 42-inch OLED for a bedroom, office or small room and want voice assistants built in.

Prices

  • LG C5 Series OLED evo 4K TV: $1,680.25 at Walmart (last seen Nov 9)
  • Samsung S90D 42" OLED TV: $997.99 at Amazon (last seen Nov 9)
  • Difference: the Samsung S90D 42" OLED TV is $682.26 cheaper than the LG C5 Series OLED evo 4K TV at the latest prices (Nov 9)
LG
LG 77" C5 Series OLED evo AI 4K Smart webOS 25 TV

LG C5 Series OLED evo 4K TV

LG 77" C5 Series OLED evo AI 4K Smart webOS 25 TV

4.8(1,014 ratings)
$1,680.25at WalmartChecked 21 h ago
See all prices and details
Visit Walmart
Pros
  • Huge 77-inch OLED picture with near-infinite contrast
  • Dolby Vision and Dolby Atmos support
  • 144Hz VRR and four HDMI 2.1 ports suit consoles and PCs
  • Alpha 9 Gen8 processor handles upscaling and picture presets
  • Highest owner rating of the two
Cons
  • Very large; needs a big wall and seating distance
  • OLED panels can dim static logos and burn in with constant news tickers
  • No Google Assistant or Alexa built in
Samsung
SAMSUNG 42" Class S90D OLED Smart TV QN42S90DAEXZA 2024

Samsung S90D 42" OLED TV

SAMSUNG 42" Class S90D OLED Smart TV QN42S90DAEXZA 2024

4(574 ratings)
$997.99at AmazonChecked Nov 9
See all prices and details
Visit Amazon

As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • Compact 42-inch OLED fits bedrooms and desks
  • Google Assistant and Alexa built in
  • 120Hz panel with four HDMI ports
  • Anti-glare coating helps in bright rooms
Cons
  • No Dolby Vision
  • 120Hz rather than 144Hz for PC gaming
  • Lower owner rating and fewer ratings than the LG
  • Small screen gives less immersion for films

What separates them

LG C5 Series OLED evo 4K TVSamsung S90D 42" OLED TV
Screen size77 inches, a main-room set42 inches, a small-room set
Processor and upscalingAlpha 9 Gen8 AI processor tuned for OLEDAI-powered 4K upscaling
HDR formatsDolby Vision, HDR10 and HLGHDR10 and HLG; no Dolby Vision
Gaming refresh144Hz VRR for PC, 0.1ms response120Hz
HDMI inputs4 HDMI 2.1 ports4 HDMI ports
Voice assistantswebOS 25 with LG's AI searchGoogle Assistant and Amazon Alexa built in
Owner rating4.8 out of 5 from 1,014 ratings4 out of 5 from 574 ratings
Room fitNeeds a large wall and viewing distanceFits shelves and small rooms

Price history

$1,915.46$997.99
Nov 5Nov 10
  • LG C5 Series OLED evo 4K TV: lowest $1,680.25 on Nov 7 at Walmart; $1,779.95 on Nov 10.
  • Samsung S90D 42" OLED TV: lowest $997.99 on Nov 9 at Amazon.

Prices at every store

LG C5 Series OLED evo 4K TV

  • WalmartNew

    In stockSold by Brandsmart USAReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $1,680.25Free shippingChecked 21 h ago
    Visit Walmart
  • WalmartNew

    In stockSold by Beach Camera

    $1,779.95Free shippingChecked 21 h ago
    Visit Walmart
  • Abt Electronics & AppliancesNew

    In stock

    $1,798.00Free shippingChecked 21 h ago
    Visit Abt Electronics & Appliances
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $1,779.95Free shippingChecked 11 h ago
    Visit Amazon
All 9 stores and price history →

Samsung S90D 42" OLED TV

  • Newegg.comNew

    In stockSold by Walts TV

    $1,869.99Free shippingChecked Nov 9
    Visit Newegg.com
  • AmazonRefurbished

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $859.99Free shippingChecked Nov 9
    Visit Amazon
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $997.99Free shippingChecked Nov 9
    Visit Amazon
  • WalmartNew

    Out of stockSold by Datavision Computer VideoReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $997.99Checked 20 h ago
    Visit Walmart
All 3 stores and price history →

Specs compared

SpecLG C5 Series OLED evo 4K TVSamsung S90D 42" OLED TV
colorBlackGray
Display TypeOLEDOLED
Screen Size (in)7742
Resolution4K3840 x 2160
HDTV Format4K UHD4K
Refresh Rate144Hz120 Hz
Anti-GlareYesYes
HDMI Ports44 HDMI ports
Screen size77 in42 inches
HDRYesYes
High Dynamic Range (HDR)Yes—
High Dynamic Range (HDR) TypeDolby Vision, HDR10, HLG—
Show all 40 specsShow fewer specs
SpecLG C5 Series OLED evo 4K TVSamsung S90D 42" OLED TV
OutdoorNo—
SeriesC5 Series OLED evo 4K (2025)—
Smart TVYes—
Network FunctionalitySmart TV, Streaming—
Supported Resolutions4K—
Backlight TechnologyOLED—
Display HighlightsHDR—
Max Resolution V-SyncVRR—
Display Aspect Ratio16:9—
Dynamic Contrast Ratio

What reviewers say

LG C5 Series OLED evo 4K TV

  • 4.8 / 51,014 ratings

Rated 4.8 out of 5 from 1,014 ratings, the C5 is widely liked for its picture quality and gaming features. Complaints center on brightness in very bright rooms and the care OLED needs.

What people mention
  • Picture qualityPraisedOwners call the contrast and color excellent, especially in dark rooms.
  • GamingPraisedBuyers like the 144Hz panel, VRR and four HDMI 2.1 ports for consoles and PCs.
  • BrightnessMixedBoosted brightness helps, but some say it still trails bright LCDs in sunny rooms.
  • Burn-inCriticisedSome owners worry about static logos and news tickers over long use.

Samsung S90D 42" OLED TV

  • 4 / 5574 ratings

Owners and reviewers praise the picture, contrast and motion, and many chose it because it is one of the few small OLEDs available. Complaints center on brightness and sound.

What people mention
  • Picture qualityPraisedOwners say the OLED panel delivers deep blacks and strong contrast for movies and streaming.
  • BrightnessCriticisedReviewers note it dims in bright rooms compared with brighter OLED and mini-LED sets.
  • SoundCriticisedBuilt-in speakers are described as thin, with many owners adding a soundbar.
  • MotionPraised
Reviews
  • Best 75-Inch (and up) TVs
  • LG 77-Inch Evo C5 OLED TV - PCMag editors select and review products independently
  • The LG 77-inch C5 OLED drops to $1,999, and nothing at this screen size and price comes close on picture quality
  • LG 77-Inch Evo C5 OLED TV
  • The Best 75-Inch (and Up) TVs for 2026

Questions and answers

Which is better for movies?
The LG C5. Its 77-inch panel, Dolby Vision and Alpha 9 Gen8 processing give a bigger, more cinematic picture. The Samsung is sharp but small for a main viewing room.
Which is better for gaming?
The LG C5 edges it with 144Hz VRR and a 0.1ms response time. The Samsung's 120Hz panel and four HDMI ports still handle consoles well.
Do I need Dolby Vision?
Only the LG C5 supports Dolby Vision. If you watch Dolby Vision content on Netflix or Disney+, the LG shows it as intended; the Samsung falls back to HDR10.
Which lasts longer?
Both use OLED panels with similar lifespans. The LG's larger screen and higher brightness make burn-in from static logos more of a concern if you leave news channels on for hours.
Is the LG worth stepping up to?
Yes if you have the space and watch films or game on a big screen. The Samsung makes more sense when 77 inches will not fit or you want built-in Alexa and Google Assistant.
Which has better smart features?
The Samsung has Google Assistant and Alexa built in. The LG runs webOS 25 with LG's AI search and a wide app selection, but you add voice assistants through other devices.

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  • Samsung S90D OLED 4K Smart TV (2024) vs LG 77" C5 Series OLED evo AI 4K Smart webOS 25 TV

Buying guides that pick them

  • Best value OLED TVs
  • Best large OLED TVs
Infinite contrast
—
Image Contrast RatioNear-infinite—
Viewing AngleWide—
Menu LanguageSpanish, English, French—
Color TemperatureYes—
ModelOLED77C5PUAUPC: 195174102701—
Internet Streaming ServicesNetflix, Disney+—
Network ConnectivityEthernet—
Video InterfaceHDMI—
PC InterfaceHDMI—
CEC EnabledYes—
DisplayOLED—
BrandLG—
Television typeOLED TVs—
Smart techY—
Tv featuresBluetooth, High Dynamic Range—
PlatformwebOS—
Virtual asst.Alexa, Google Assistant—
HDMI number4—
The 120 Hz panel is called smooth for sports and gaming.