don't even need to scale arnie or get a better quality shot, peak arnolds got that special something that beats him out, he flows better, quads are similar in shape and size but arnies are better separated and deeper cut. he also has better separation between his other muscles. His lats insert lower, his arms are easily more impressive, his back is better detailed could go on and on.
That said I think they are the 2 best mr olympias of all time.