I've met Ronnie in person. Nice guy and looks alot shorter in person. Maybe 5' 9" or 5' 10", but very wide. For pure mass ronnie is bigger pretty much all over except Arnold does have those biceps and a better chest.
Arnold looks like he did everything right. He's really the only person I've ever seen pull off having that much muscle and keeping it all symmetrical and proportionate. I have no idea how he did it ...looks like it was a nightmare trying to balance that all out.
I don't know if we will ever see anything like it again(classic symmetry). People don't take the time to look good any more, they will go mafter the size anyway they can get it and whaere its easy, even if they're all out of proportion and the symmetry is a trainwreck.
All I see is...
Arnold --- Artistic statue
Ronnie --- Roid monster
Both accomplished their goal though...