I think the people who would pick Dexter over Phil Heath are mostly giving him credit for years of quality performances in bodybuilding, and while that may be the case, I don't think he is as good as Phil. Better conditioned, yes, better, no.
I disagree. I believe that AT THIS MOMENT dex is superior to phil but phil may eventually eclipse dex.
Just not right now.
Both men have their structural flaws, heath is narrow, dex have high lats. Both have small frames.
In terms of bodyparts phil has noticebly better quads and calves. His arms are better too but its not like dex is a slouch in the guns department.
Dex has incredible delts, abs, chest and back, just too much for a young heath.
One of phil's strengths - his conditioning, really becomes a moot point with regards to dexter who is superior in that regard and whose density and quality far outshines a relatively inchoate heath who by comparison doesn't have that "finish" that dex has.
For this reason i say dexter for the win