I, for one, get annoyed when I watch ESPN analysts talk about boxing.
To me, Tyson was the 1980's version of the 1960's Sonny Liston. Similar build and style, both coming off knocking out everybody.
Ali in his prime, woudl beat Tyson by Late TKO/UD. Once Tyson figured out he couldn't KO Ali in the firdt 4-5 rounds and after he kept eating jabs from Ali and quick combos, he would cave in. He caved against Buster, who out-boxed and danced aorund Tyson at times. I see Ali by a mid-to-late TKO in 10 or 11 rounds. Ali had too much speed for tyson, who fought like Liston did, just watch the videos of each. And Ali could take a punch. He took shots from Liston, Chuvalo, Frazier, Foreman, Lyle, Shavers, etc.
Ali in his prime vs. Tyson in his prime.....Ali by TKO in 10-11 rounds. Yes, Iron Mike would make it tough on Ali in the early going (4-5 rounds), but tyson caves when he see's he can't effectively get to a prime Ali, who's dancing all night.