Swap Muhammad Ali's title reigns around

Zaire Foreman ran out of gas even quicker than under-trained ageing Liston.
Foreman looked all spent by round 6, even worse than when Liston quit.
And Liston has the "excuses" of being older and less fit and facing a more mobile Ali.

Therefore, Foreman's ONLY "better" because he didn't quit.
But by that token, we can say Chuvalo and Terrell were better than both because they went 15 rounds and never quit !