When it comes to upperbody mass, separation of the muscle belly's, balance is give or take (depending on your point of view) Robby had a much better Whoa factor than Zane in the late 70s when Zane was winning, However Zane APPEARS to have had a more COMPLETE balance than Robby, less whoa factor for sure, but overall better balance from head to toe of all the muscle groups, not a knock on Robby who was outstanding just a observation.