The TCL QM8 65 Inch outperforms the Hisense U6K 55 Inch across most metrics with 144Hz refresh and higher brightness (2000 nits peak per RTINGS). Hisense U6K provides solid entry-level Mini-LED at a lower price point but trails in gaming features and motion handling. Size difference favors the TCL for immersive viewing despite the 10-inch diagonal gap.