Haye is a very hard puncher and at heavy he might be way more powerful. You can't say Haye has no chance of knocking Vitali out because Haye could knock out any man if he lands right, surely?

Haye has the speed to catch anyone clean, Vitali uses his height and reach to full effect though so I would say Vitali can beat him.

Wlad though, Haye can beat him, all he has to do is land once and I think his speed will get him there.