The Hisense U8N 65" outperforms the LG QNED80 55" with 2000 nits peak brightness versus 500 nits (RTINGS) and 144Hz refresh versus 120Hz, making it superior for HDR gaming and bright rooms. The LG offers a lighter 55-inch chassis and refined webOS but trails in contrast and brightness. Hisense wins on size-adjusted performance metrics from multiple 2024 reviews.