Here is a pic of Coleman that is purported from the 2005 Mr. Olympia. I don't know about the bumps in the back, but the difference between Yates and Coleman is Yates is drier with lats that insert near his posterior iliac crest (down to his ass basically). He is thick as shit, but his arms are definitely lacking and his glutes are not striated. Coleman is as thick but wider, but his lats don't taper down as far. His arms are way better as are his hams/glutes. Yates kills him in the calves, though. I personally think Coleman is the more aesthically pleasing BB, but this is very subjective. Overall, probably the two best back double bi's in history. Take your pick, there is no slam dunk winner. Kind of like Bird vs Magic.