I don't know about that. Cain has shown a much more well rounded style than Miocic has by far.
Sure Miocic hits hard and the credentials before MMA to back up his ability in striking and wrestling. But in the cage he never puts it all together. He gets tagged hard in just about every fight and that is a dangerous game to be playing at HW. You never see him really mix up any of his wrestling ability with his strikes. He is almost just a rock em sock em robot in the cage.
I don't know what to think of Miocic. I surely don't look at him in the way you look at guys like Jon Jones, GSP, or Silva. Yet people want to compare him to all time greats.