The Hisense U8N 65" outperforms the LG B4 OLED 55" in bright rooms with 2000 nits peak brightness and 144Hz refresh (per RTINGS 2024 tests) while the LG B4 excels in dark-room contrast with perfect blacks. Hisense wins on gaming metrics with lower lag and higher frame rate support. LG B4 is preferable for cinematic viewing where viewing angles matter most.