I don't even know why this argument has gone on as long as it has - Nasser at his absolute best would never have beaten Yates in a million years.
People seem to forget that the mandatories include several back and side poses - Yates wins them all hands down - he may not have been heavier or bigger, but he was more complete, dry, conditioned, separated and every other which way you want to call it. Only the front double bicep pose was Yates's weakness for obvious reasons but Mr Olympia contests are won with having a bit more than having a missing bicep.