Someone has inspired me to ask this question of the ESB masses. Please vote, and share your thoughts.
Valuev can't punch, Couser got Barrett out of there in 2, and Wlad had him falling down every where when they fought, so I would say Haye is a much harder puncher.
Valuev punches harder but they are slower so it is easier to defend against his punches, blocking, dodging, ect . . .
Okay, apparently you guys didn't study squat in school. Let me draw you guys an analogy. David Haye is a Ferrari. Valuev is a large garbage truck. You get in your Ferrari and smash into a wall doing 100 mph. What do you get, a smashed up Ferrari and a slightly damaged wall. You get in your garbage truck and smash into the same wall doing 60 mph. what do you get? A huge hole in the wall where the garbage truck went right through it. That's the difference between Haye and Valuev.