Haye gasses and Bruno puts him down somewhere between 4 and 8. It would be wildly more entertaining than any fight featuring a Klit.
Bruno had a good jab, but I think he was too methodical to shut Haye down early, which is why I think Haye might have the edge, he has the potential to hurt Bruno before Bruno could hurt him imo. Also, Bruno might of been the kind of fighter who needs to get set to throw a big punch, so the movement could offset him. 60/40 Haye imo. Lewis got his head jabbed off by big Frank, but Lewis is not as quick as Haye, does not use his wheels aswell as Haye either, not to mention, Lewis probably overlooked Frank.
I'd fancy Frank to stop him. No matter what type of fight it was or regardless of who wins, Haye would'nt come out of it looking too pretty! Haye has speed and power, but he has'nt been in with a heavy like Bruno and maybe he never will be.
Bruno would win 5 out of 10 fights vs. Haye in my opinion. Bruno lacked mental strength but he had good skills, a decent chin and a good jab. Unless Haye could trouble Bruno early he'd end up losing UDs. Prime Bruno wouldn't hold a belt in today's division, not for long anyways. He'd be like the Ruizes and Peters of the last 10 years. Win a belt and quickly lose it again. Bruno in no shape or form would ever "clean up" today's division. Not even close.