This discussion should be called "can a fighter who never made the grade as a pro beat an ATG who was smaller." the answer is always no .....unless the ATG was European. charlie burley v johnny paycheck. marvin hagler v peter mcneeley roy jones v jean pierre coopman georges carpenteir v audley harrison hmmm.
Carpentier isn't an ATG or in the class of those other small men, Audley is better than the other big men and despite being no great is an intimidating task for a small LHW, who was the size of a modern MW. I'm not saying Carpentier can't win, I'm not saying Audley is any great shakes (although he is underrated here) I'm saying lots and lots of size affects a match up massively