No way , to me, to compare Foreman and Marciano ... the first incarnation of Foreman had serious stamina issues while Marciano could go all night ... Walcott had a huge shot of pulling off a decision or late round stoppage over the post Zaire / pre-retirement Foreman... I think he has a much harder fight against the second version of Foreman ... Pre-Zaire I like George ... let's not Forget how much punishment Ali had to absorb to win and Walcott did not have that chin or toughness ...