The LG G5 OLED 83 wins decisively with perfect blacks and 120 Hz performance that the Hisense U6K cannot match. RTINGS and CNET data show the LG's contrast ratio exceeds 1,000,000:1 versus the Hisense's 5,000:1 range. The 83-inch size also provides a more immersive experience than the 65-inch Hisense for cinematic viewing.