It reflected poorly on Vitali that he quit but it didn't have a lot to do with Byrd imo, who didn't win a round and wasn't going to turn the fight around. Byrd fought Wlad like a year after Ike beat him and before any of his best performances, no idea where that comes from. Ike would not have beaten a prime Tyson based on anything he ever showed in the ring, going by the Tua fight alone Tyson would've thrown more with a much better variety without getting hit so much.