Bruno would probably knock him out quite early. Bruno was aggressive early on, and monstrous strong and powerful, and did the basics well enough. Bruno wasn't particularly good at world level. He fought mostly old has-beens and set-ups, like Haye does now. Still, he'd beat Haye I think. Haye's got decent speed and very good power but he's got more holes in his defence than swiss cheese, and he's never fought anyone remotely young and "live" at heavyweight, not even a second-rater heavyweight. Haye's overrated. He's done nothing.