The reason I can't really take people serious when they say prime for prime Vitali or Wlad would beat most other good or great HW's is simple......
A prime Vitali fought a way past prime and out of shape Lennox, and was only up 4-2 in the fight, 3-3 depending on who you talk to, and than proceeded to get his face ripped to shreds and the fight was stopped. I mean that was the best fighter he's ever faced, a way faded and out of shape Lennox, and that's how he performed. So how does he handle a prime Ali, Foreman, Holmes, Tyson, Bowe, Holyfield, Lennox, and others???
And Wlad in his prime was stopped by Corrie Sanders and Lamon Brewster. Yes, I know he avenges the Lamon Brewster loss, but who's to say he wouldn't get stopped by the likes of Liston, Tyson, Holyfield, Bowe, and Lewis prime for prime or others???