My back assessment, gentlemen.
Dorian's back vs Ronnie's back:
Width : Coleman. Coleman has a wider back, mainly because his lats are little bit higher than Dorian's, and his structure allows for it. You might be able to post a pic here and there on the contrary, but there exists a 100 for each 1 that states otherwise.
Mass/Thickness : This is a tough call mainly because it ties in with conditioning. I'm going to say that they are roughly even! Coleman looks a bit more beefy but he also holds more water in the back.
Symmetry: Coleman. Yates has an irregular looking trapezius that I find distracting. The groups and tie ins just flow better with me with Coleman, so sue me.
Definition: Yates. Yates has a dryness and striated back that coleman can't match. Again, you may post pics here and there on the contrary, but there are far too many pics otherwise.