I reckon Foreman gets inside Tyson's head before & during this fight & intimidates him. Tyson's confidence was always pretty fragile, even at the beginning of his career, it's just that the opposition were not good enough to take advantage.

George hits harder & I agree that the Frazier fight is a massive indication of how this one would pan out. Foreman would probably get rocked but would take Tyson out in around 9.