AI comparison report

LG OLED77C64 vs Samsung 77S90F

By CompareAI Editorial Team · Published 2026-09-07 · How we compare

The LG OLED77C64 is the superior overall choice over the Samsung 77S90F due to its complete Dolby Vision support, faster 165Hz refresh rate, and comprehensive…

Who wins: LG OLED77C64 or Samsung 77S90F?

Choose the LG OLED77C64 first for its superior format support with Dolby Vision, faster 165Hz gaming performance, consistent Primary RGB Tandem WOLED 2.0 panel hardware, and comprehensive 5-year warranty protection.

Based on our analysis across 5 dimensions with 20 sources, LG OLED77C64 scores 9.4/10 overall while Samsung 77S90F scores 8.0/10 overall.

DimensionLG OLED77C64Samsung 77S90F
Panel Technology & Peak Brightness9.2/107.8/10
HDR Formats & Video Processing Engine9.5/108/10
Gaming Refresh Rates & Input Responsiveness9.7/109.1/10
Smart TV Platform & AI Features9.2/108.8/10
Glare Handling & Panel Warranty Protection9.5/106.5/10
Overall9.4/108.0/10

Should I choose LG OLED77C64 or Samsung 77S90F?

Verdict: Choose the LG OLED77C64 first for its superior format support with Dolby Vision, faster 165Hz gaming performance, consistent Primary RGB Tandem WOLED 2.0 panel hardware, and comprehensive 5-year warranty protection.

The LG OLED77C64 is the superior overall choice over the Samsung 77S90F due to its complete Dolby Vision support, faster 165Hz refresh rate, and comprehensive 5-year panel warranty.

The LG OLED77C64 outperforms the Samsung 77S90F across critical performance and reliability benchmarks. The LG OLED77C64 delivers superior gaming specs with a 165Hz native refresh rate and a rapid 0.1ms response time across all four HDMI 2.1 ports, compared to the Samsung 77S90F featuring a 144Hz refresh rate and a 9.1ms input lag profile. In image processing and HDR versatility, the LG OLED77C64 uses the Alpha 11 AI Gen3 processor with full Dolby Vision and Dolby Vision IQ support, whereas the Samsung 77S90F relies on the NQ4 AI Gen3 processor with HDR10+ and completely lacks Dolby Vision. Furthermore, the LG OLED77C64 guarantees a Primary RGB Tandem WOLED 2.0 panel with Reflection Free Premium coating and a 5-year OLED Care+ panel warranty, avoiding the regional panel lottery of the Samsung 77S90F and exceeding its standard 1-year warranty coverage.

Best for LG OLED77C64

  • Viewers seeking guaranteed Primary RGB Tandem WOLED 2.0 panel architecture with Brightness Booster Pro
  • Home theater enthusiasts requiring Dolby Vision and Dolby Vision IQ dynamic HDR decoding
  • Competitive PC and console gamers wanting a native 165Hz refresh rate and 0.1ms response time across 4 HDMI 2.1 ports
  • Users who prefer webOS 2026 with integrated Google Gemini and Microsoft Copilot dual AI assistance
  • Buyers wanting long-term peace of mind with an OLED Care+ 5-year panel warranty and Reflection Free Premium coating

Best for Samsung 77S90F

  • Users invested in the Samsung ecosystem wanting a built-in SmartThings Hub with 3D Map View
  • Gamers seeking cloud gaming access via the Samsung Gaming Hub alongside 144Hz VRR support
  • Streamers looking for extensive free television with over 2,700 streaming channels
  • Consumers prioritizing long-term OS software support backed by 7 years of Tizen OS upgrades
  • Viewers with dedicated HDR10+ content libraries powered by the NQ4 AI Gen3 processor

When not to compare directly

Do not compare them directly if you are strictly committed to the Samsung SmartThings smart home ecosystem or if your regional market specifically guarantees a QD-OLED panel on the Samsung 77S90F that alters its baseline color volume profile.

What are the key differences between LG OLED77C64 and Samsung 77S90F?

  • Panel Technology & Peak Brightness

    While the LG OLED77C64 guarantees a 77-inch Primary RGB Tandem WOLED 2.0 panel with Brightness Booster Pro across all units, the Samsung 77S90F introduces regional panel variation between QD-OLED and standard WOLED architectures [3, 8].

    LG OLED77C64: The LG OLED77C64 features a 77-inch 4K Primary RGB Tandem WOLED 2.0 panel with Brightness Booster Pro, delivering consistent high peak luminance and extended panel lifespan [3].

    Samsung 77S90F: The Samsung 77S90F utilizes a 77-inch 4K panel architecture that varies between QD-OLED and standard WOLED depending on regional sourcing and production batch [4, 8].

    Scores — LG OLED77C64: 9.2/10, Samsung 77S90F: 7.8/10

    Determines peak luminance, color volume, panel lifespan, and performance in bright viewing environments.

    Sources: 77 inch LG OLED evo AI C6 4K Smart TV 2026, 77" OLED S90F 4K Vision AI Smart TV (2025) - Samsung

  • HDR Formats & Video Processing Engine

    While the LG OLED77C64 features the Alpha 11 AI Gen3 processor and full Dolby Vision/Dolby Vision IQ decoding, the Samsung 77S90F relies on the NQ4 AI Gen3 processor with HDR10+ support and completely omits Dolby Vision.

    LG OLED77C64: The LG OLED77C64 is powered by the Alpha 11 AI Processor Gen3 and delivers comprehensive high dynamic range support including Dolby Vision, Dolby Vision IQ, HDR10, and HLG across its 4K panel.

    Samsung 77S90F: The Samsung 77S90F utilizes the NQ4 AI Gen3 processor with 4K AI upscaling and supports HDR10, HDR10+, and HLG, but lacks compatibility with Dolby Vision formats.

    Scores — LG OLED77C64: 9.5/10, Samsung 77S90F: 8/10

    Affects dynamic range mapping, upscaling clarity, and compatibility with streaming and disc content standards.

    Sources: 77 inch LG OLED evo AI C6 4K Smart TV 2026, 77" OLED S90F 4K Vision AI Smart TV (2025) - Samsung

  • Gaming Refresh Rates & Input Responsiveness

    The LG OLED77C64 offers a faster 165Hz refresh rate and near-instant 0.1ms response time compared to the 144Hz refresh rate and 9.1ms input lag profile of the Samsung 77S90F.

    LG OLED77C64: The LG OLED77C64 delivers cutting-edge gaming responsiveness with support for up to a 165Hz native refresh rate, a rapid 0.1ms response time, and full-bandwidth HDMI 2.1 across all four ports.

    Samsung 77S90F: The Samsung 77S90F provides high-tier gaming performance featuring a 144Hz variable refresh rate and a low 9.1ms input lag profile for smooth, low-latency console and PC play.

    Scores — LG OLED77C64: 9.7/10, Samsung 77S90F: 9.1/10

    Critical for competitive console and PC gamers seeking the lowest motion blur, high frame rates, and low latency.

    Sources: 77 inch LG OLED evo AI C6 4K Smart TV 2026, Samsung S90F OLED TV Review - RTINGS.com

  • Smart TV Platform & AI Features

    While the LG OLED77C64 integrates conversational dual-engine AI via Google Gemini and Microsoft Copilot within webOS 2026, the Samsung 77S90F focuses on connected ecosystem control with 7 years of Tizen OS updates and a built-in SmartThings Hub.

    LG OLED77C64: The LG OLED77C64 runs webOS 2026, delivering an advanced multi-AI ecosystem powered by integrated Google Gemini and Microsoft Copilot with a dedicated AI Hub button, plus access to over 400 free LG Channels and 10,000+ on-demand titles.

    Samsung 77S90F: The Samsung 77S90F operates on Tizen OS backed by 7 years of OS upgrades, integrating a built-in SmartThings Hub with 3D Map View and the Samsung Gaming Hub alongside over 2,700 free streaming channels.

    Scores — LG OLED77C64: 9.2/10, Samsung 77S90F: 8.8/10

    Influences the day-to-day user interface, app ecosystem, voice assistance, and streaming integration.

    Sources: 77" Class 4K OLED TV, Samsung Vision AI Smart TV, S90F 2025, 77 inch LG OLED evo AI C6 4K Smart TV 2026

  • Glare Handling & Panel Warranty Protection

    While the LG OLED77C64 provides dedicated reflection reduction and an extensive 5-year OLED Care+ panel warranty, the Samsung 77S90F comes with a standard 1-year warranty alongside its LaserSlim anti-reflective filter.

    LG OLED77C64: The LG OLED77C64 features Reflection Free Premium coating along with an extended OLED Care+ 5-year panel warranty to mitigate long-term burn-in risks.

    Samsung 77S90F: The Samsung 77S90F utilizes a LaserSlim anti-reflective filter for reflection management and is backed by a standard 1-year manufacturer warranty.

    Scores — LG OLED77C64: 9.5/10, Samsung 77S90F: 6.5/10

    Ensures comfortable daytime viewing with minimal reflections and protects against long-term OLED burn-in concerns.

    Sources: 77 inch LG OLED evo AI C6 4K Smart TV 2026, Samsung S90F OLED TV Review - RTINGS.com

What are the pros and cons of LG OLED77C64 vs Samsung 77S90F?

LG OLED77C64

Strengths

  • The LG OLED77C64 features a 77-inch 4K Primary RGB Tandem WOLED 2.0 panel with Brightness Booster Pro, guaranteeing consistent high peak luminance across all units.
  • The LG OLED77C64 is powered by the Alpha 11 AI Processor Gen3 and provides comprehensive HDR support, including Dolby Vision, Dolby Vision IQ, HDR10, and HLG.
  • The LG OLED77C64 delivers cutting-edge gaming performance with a 165Hz native refresh rate, a rapid 0.1ms response time, and full-bandwidth HDMI 2.1 across all four ports.
  • The LG OLED77C64 runs webOS 2026, offering multi-AI integration with Google Gemini and Microsoft Copilot alongside access to over 400 free LG Channels and 10,000+ on-demand titles.
  • The LG OLED77C64 includes Reflection Free Premium coating and provides peace of mind with an extended 5-year OLED Care+ panel warranty.

Samsung 77S90F

Strengths

  • The Samsung 77S90F features the NQ4 AI Gen3 processor with 4K AI upscaling and supports HDR10, HDR10+, and HLG.
  • The Samsung 77S90F delivers strong gaming capabilities with a 144Hz variable refresh rate and a low 9.1ms input lag profile.
  • The Samsung 77S90F operates on Tizen OS backed by 7 years of OS upgrades, integrating a built-in SmartThings Hub with 3D Map View and the Samsung Gaming Hub alongside over 2,700 free streaming channels.
  • The Samsung 77S90F utilizes a LaserSlim anti-reflective filter for daytime glare management.

Weaknesses

  • The Samsung 77S90F introduces regional panel variation between QD-OLED and standard WOLED architectures depending on regional sourcing and production batch.
  • The Samsung 77S90F completely omits Dolby Vision and Dolby Vision IQ format decoding.
  • The Samsung 77S90F offers a 144Hz refresh rate and a 9.1ms input lag profile, which trails the LG OLED77C64's 165Hz refresh rate and 0.1ms response time.
  • The Samsung 77S90F includes only a standard 1-year manufacturer warranty, lacking the 5-year panel warranty coverage of the LG OLED77C64.

Where does this data come from?

  1. 77 Inch LG OLED evo AI C6 4K Smart TV 2026
  2. 77" Class 4K OLED TV, Samsung Vision AI Smart TV, S90F 2025
  3. 77 inch LG OLED evo AI C6 4K Smart TV 2026
  4. Samsung S90F OLED TV Review - RTINGS.com
  5. 195 cm (77 inch) AI C6 4K Smart TV - OLED evo
  6. 77” Class S90F Series OLED 4K UHD SamsungVision AI Smart Tizen TV ...
  7. 76.77" LG OLED77C6HUP - Specifications
  8. 77" OLED S90F 4K Vision AI Smart TV (2025) - Samsung
  9. 77 Inch LG OLED evo AI C6 4K Smart TV 2026
  10. Samsung S90F 77" (WOLED) review/experience? : r/4kTV - Reddit
  11. 77 Inch Class LG OLED evo AI C6H 4K Smart TV 2026
  12. 76.77" Samsung QN77S90F - Specifications - DisplaySpecifications
  13. 195 cm (77 inch) AI C6 4K Smart TV - OLED evo
  14. Samsung S90F Review - IGN
  15. 77 inch LG OLED evo AI C6 4K Smart TV 2026
  16. Samsung S90F oled or woled ? : r/OLED_Gaming - Reddit
  17. LG OLED C6 Series Full Specs and Pricing Released ...
  18. Compare SAMSUNG OLED S90F (WOLED) vs ... - Choose.TV
  19. LG C6 OLED TV release date, confirmed specs & price
  20. 2025 Samsung S90F specifications and features (4K QD-OLED and ...

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