The LG G5 OLED 65 outperforms the Hisense A6 Series 4K 75 in picture quality with perfect blacks and 144 Hz refresh rate (per RTINGS), while the Hisense provides a larger 75-inch display at a lower cost. The LG wins on performance and features but the Hisense edges value for basic large-screen needs. LG G5 is the clear winner for most users seeking premium visuals.