A) He didn't beat Chavez. He struggled to a draw against and overweight, over-the-hill, shopworn, partied out Chavez with too many fights under his belt. B) Pac's dynamicism is polar opposite of Chavez' methodical technical brilliance.
I was kiddin. Also struggled isn't a word I'd use. I really don't know who'd win. Probably Pea without giving it enough thought.