Durable means you're able to take punishment while Stamina means you're able to keep a high workrate for long periods of time without tiring

2 completely different things although they can be found together in certain fighters, Jack Dempsey, Rocky Marciano, Joe Frazier (vs Ali especially), Evander Holyfield, Marvin Hagler.

Some guys are durable but don't have the stamina: old George Foreman, Mike Tyson, Tex Cobb, old Bernard Hopkins etc.

Some guys have stamina but aren't durable: Floyd Patterson, Leo Dorin, Arturo Gatti, etc.



When Miguel Cotto encountered Antonio Margarito the first time, Miguel had mowed down everyone else in front of him and had planned to do the same to Toni, but Margarito didn't wilt from the power of Cotto's shots and didn't tire from Cotto's aggression (as well as his own punch output) ergo Toni was too durable & had great enough stamina to beat Cotto (and of course the loaded wraps hurt Miguel too of course).