ONLY THE FINISHING TOUCH OF PEACE!
Look at where Roelly's biceps insert compared to my short muscle bellies. All the drugs in the world are not going to allow me to develop arms like his. Although Ben Pakulski has the same biceps insertion issue as me, and has developed good biceps...but not like Roelly's.
So yes, I would say Roelly does have superior genetics - especially for arms. Very Goodrum-like.