Neither would move much, Foreman's dream, but McCall likely had the greatest chin in boxing history. Maybe human history, like a giant Neanderthal. Foreman would batter him & win, but McCall would never go down.
Mc Call need to be at his best to defeat George. Mc Call at Bruno fight will lose. both have iron chin so the fights will end in decision.
Best for best i'd pick McCall. Foreman becoming crazy over-rated round here in his second career IMO.
McCall could barely beat a 45 y/o husk of Larry Holmes. . Holmes nearly won the fight with just his jab. Foreman of 88-92 would bash MaCall from pillar to post and might even stop him if Bull is brave enough to engage..