Liston KO's Holyfield late in the fight, around 10 or 11. Evander as great as he was, is still a bulked up cruiserweight. Sonny is a natural heavyweight. Evander definitely makes this fight very entertaining and quite possibly hurts Liston in the fight with his counterpunching. I still think Liston would be too much for Holyfield and he would eventually get stopped.
Well that bulked up cruiserweight did beat Mike Tyson on the inside, outside and anything in between, right after Tyson looked fantastic against Frank Bruno. I think the Bald Warrior would take Liston by decision if he fights smart, which is always a big if in his case. Heart is a poor substitute for intelligence.
This would be a war. I'd maybe gave the slight edge to Holyfield. But Liston flooring Holyfield isn't out the question.