LG B4 OLED 77 vs LG C4 OLED 42

By Billy G. · Founder & Lead EditorVerified Jun 8 by Billy G.

LG B4 OLED 77
LG B4 OLED 77
LG C4 OLED 42
LG C4 OLED 42
Verified Confidence: 85%

Verdict: LG C4 OLED 42 for gamers needing 144Hz and higher brightness per RTINGS and Tom's Hardware tests, while the LG B4 OLED 77 excels for movie nights in big rooms with its size advantage. The C4's α9 processor delivers better upscaling than the B4's α8. Size difference makes direct comparison use-case dependent rather than pure spec superiority.

Winner: LG C4 OLED 42

LG B4 OLED 77: 7.5/10

LG C4 OLED 42: 8/10

Spec-by-spec comparison

LG B4 OLED 77LG C4 OLED 42
screen_size77 inches42 inches
resolution3840x21603840x2160
refresh_rate120Hz144Hz
processorα8 AI Processorα9 AI Processor Gen7

LG B4 OLED 77

What works

  • 77-inch screen ideal for large living rooms
  • True OLED blacks with 120Hz panel
  • webOS 24 with Magic Remote included

What doesn't

  • Only 120Hz refresh rate limits high-frame-rate gaming
  • Lower peak brightness than C4 series (around 450 nits)

LG C4 OLED 42

What works

  • 144Hz refresh rate supports 4K@144Hz gaming
  • Higher peak brightness (around 1400 nits) for HDR
  • Compact size fits desks or small spaces

What doesn't

  • 42-inch screen too small for living room viewing
  • Fewer HDMI 2.1 ports than larger C4 sizes

Bottom line

Our pick: LG C4 OLED 42.

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