Dorian crushes Ronnie in this shot in this year ! absolutely makes him look like a lightweight !
LOL
and there you have the key differences between ronnie and dorian:
ronnie has detailed and shapely pecs, cut quads, shapely, detailed and vascular arms.
dorian has no detail anywhere except for the chest, and a calf that overpowers the entire shot. His flexed quad is an embarassment to Mr. Olympia's everywhere.

Looks like a blob in comparison to Ronnie's quality.
dorian = more mass, poor quality.
ronnie = quality, shape along with size, a combo dorian could never ever match.