I think Tyson vs Ali would've played out similarly to Frasier vs Ali, but the one where Frasier KO'd Ali. Tyson was a quicker and harder punching version of Frasier. Unlike Frasier, though, Tyson had a more effective peek a boo style that offered better defense. Foreman and Tyson were nothing alike. Foreman was a giant brute who abandoned fundamentals and threw slow, sweeping haymakers until he gassed out verses Ali. Tyson in his short prime was a very strict fundamental fighter. I believe he would have eventually worked his way inside and landed the big short punches. 1986-1989 Tyson was really, really good. Not just a brute.