well, Arnold was also a racist, so I guess they are comparable
I wouldn't say the two are comparable, if you are familiar with the expression, which pretty much is play on "since you are white you know everything, but you don't really." which is of course a version of "that's one mans opinion".
We could get into a drawn out discussion, but I will not take this thread off tangent.
One could also say Ronnie had a big heart and Arnold had no heart, another diff. Or that Arnold was a user and that he really never held down a real full time job while competing. Ronnie did.
As I said, Arnold is the father of modern bbing, whereas Ronnie is the father of the Uber-freaks. One is Conan, the other is He-Man (or Power Man, if you will)