game over dorian.
Your pics prove exactly what I have been saying all long. Yes, Ronnie has better shape and separation--especially tie-ins--than Dorian. However, Dennis James looks as thick as Ronnie there to me. Dorian looks impressive in the MM there and is standing next to Nasser, one of the biggest & best from the front. Granted Doz doesn't have Ronnies delt/arm separation, but I can assure you that standing next to each other in their respective primes, Dorian would be more massive, would have equal, probably better conditioning, and presents his physique much better. Ronnie admittedly has better bicep peaks and delt tie-ins.
It comes down to this imo: in order for Ronnie to match Dorian in size, he has to lose some of his conditioning--edge Dorian. And, in order for Ronnie to match Dorian in conditioning, he has to lose some of his size--again, edge Dorian. Dorian had the ability to maintain size, thickness, and fullness while maintaining freaky conditioning. Of course Ronnie did too, but just not as well as Dorian. I am not claiming that Dorian would dominate Ronnie, nor that he would win decisively. Rather, I think he has the slight edge in what would be a close comparison of the two best Mr. Olympias ever.