This is irrelevant. Ronnie is being humble. He also said Arnold would beat him and recently he said something about Chris Bumstead being an all time great.
Say what you want about Ronnie- unless people disrespected or dismissed him- he was always pretty humble.
I viewed that interview with Ronnie on Arnold and was surprised by his steadfastness that Arnold with their "nutrition" would destroy them all. No hesitation on his part. He said Arnold standing next to him would make him (Ronnie) "look like a little boy".
He is right. Given his track record, height and sheer determination a young Arnold would not hold back anything. He is now a cuck but back then? And that man brought into today with today's drugs? Talk about freaks of nature? There would be nothing natural about him, more otherworldly if you consider it is Arnold that Ronnie was speaking on.
But again, I think both Haney and Coleman are great. I am more a Steve Reeves, Dave Draper, Serge Nubret and Frank Zane fan and as for Arnold, I have no problem saying he is the best that has ever been.