My father has a saying that a champion in any era would usually be a champion in another era. Pretty sure if Arnold competed along side Ronnie with all the advancements in training, diet, drugs, supps etc he'd do very well. Stick Ronnie back in the 60s and 70s and how would he go.
Arnold had that ability to rise to the challenge. 1975 Mr O was on 6 months training after dropping alot of weight to film Stay Hungry. 1980 Mr O people whinge about, but some of those photos of Arnold are insane.
Then theres what Arnold did for the sport publicity wise ....... Arnold maid (see that) bodybuilding a household sport.