I do now. Simpsons has also been around a lot longer, if we really looked into it, I'm sure there's more Homer punishment feats than there are of Peter's.
How in the world is Peter in better shape though? They both have stomach fat, but Peter clearly has a double (maybe triple) chin.
As far as strength, I vaguely remember Homer doing some pretty (impossible) feats of strength. Can't recall for Peter.
Peter is probably the better skilled combatant though.