Yeah I mean there are a lot of factors that don't make it a fair comparison. Like mentioned by Master, Ali was younger and lighter.

Also worth mentioning, Henry landed his hook in the 4th round after some relatively light action. Joe Frazier landed his hook in the 15th round of an all-out war. I think both guys were running on fumes at that point and it was far from the hardest left hook Frazier ever threw.

Henry had a great left hook. So did Quarry. But Frazier was on a different level.