I really don't see where the fuck you are coming from here Parker. What is it that you are trying to argue? That Flex and Brian are genetically identical? If you look at any picture you would see that not only did Brian have wider shoulders, but that his waist was smaller than Flex's.
You are right in saying that Brian wasn't particularly wide and that it was his waist that gave him his taper, same so of Flex, only his taper was a lot worse.
Different physiques. Small joints, good shape although different, small hips along with waist (although Brian's was clearly smaller), both black, there are the similarities.
Flex had a bad taper and a shitty chest, this is pretty clear in any picture of him. Even in 1993 his abs were protruding and his chest was way overpowered by his delts and arms. This was his best form as he hadn't destroyed himself with oil at this point.
No, Flex, Brian, Jean Guillame, Melvin Anthony, Theirry Pastel and Jojo Ntiforo all have the virtually the same physique...the same "phenotype", bascially being traced back to around the Ghana area...they come from the same "assembly line" if you will with little variations...And since Jojo is straight from Africa...his ethnic group's genetics could be the progenitor of Brian's, et al. here is Jojo:



Now, notice the small joints, the tiny wasp waist, then and round muscles bellies. Same or similar flare to the lats, and when they hold the same pose---that one hand over to the head pose that Flex is pictured doing for the 1998 Arnold, they all have the same "lines", virtually small deviations. Each of the named bbers has that, but also, that they look better around a smaller bodyweight, roughly 210-225 pounds, and they have the same flaws---harder to get dry.
Granted, Flex's arms did overpower his chest, and Brian's didn't, but Brian's upper body overpowered his lower. Basicallly its like this, you know a Corvette when you see a Corvette, or you know a Porsche 911 when you see a 911. They haven't really changed the formula, and you see the DNA within each model...the physiques of Brian, Jean-Paul Guillame, Theirry Pastel, Flex Wheeler, Melvin Anthony, and Jojo are like that 911, they all have the same formula...just slight variations