Who wins? Hard to gauge Tyson from the Roy Jones fight because I don't think he went all out. Belfort did go all out. I'd back Tyson to win.
Now listen I don't support these old dudes fighting again as these guys can seriously get hurt, BUUUTTT im going with Tyson, but i'm rather going with my heart on this one as you said, Tyson didn't really show his true potential against Jones Jr since it was a exhibition, one thing for certain, it would be more competitive then Holy v Belfort.
How about he fights Haye instead? Haye went super easy with his buddy this past Saturday, it was clear he didn’t want to hurt him, he’s shot to pieces but he should still be able to blast Belfort’s dumb ass out of the ring.