Firstly, very surprised that people have said Lewis dominated a weak division??

IMO - Ali dominated the best ever era

- Lewis dominated the 2nd best ever era


In terms of greatness Ali win hands down - if they had actually fought it would've been very interesting, I don't think the size would be a massive factor, there is only a couple of inches height difference, I would guess their reach is about the same, and Lewis at 30 years old was only about 225lbs (obviously prime Lewis was a lot bigger)

Basically I'd go for Ali all day!!