Huge difference....no one would pay to see a second bout with Frazier in 74. Foremans destruction of joe was looked on as akin to dempsey willard. After Foreman lost to Ali the match was made but no one except the most ardent Frazier fan though he had any chance.
I cant believe people think Foreman would have won a rematch. Foreman was mentally ****ed after Zaire, more than any other fighter ever. Please watch Foreman/Young and Foreman vs 5 guys in one night and tell me Foreman had improved. Foreman was a mental midget, he lost to Young, couldnt take it and retired. Then after a long layoff, he came back, he wasnt the same man physically, but mentally he was much better than hed ever been.