In my view it could be more a mountain vs flatland question than an E. Africa vs W Africa. Having traveled Africa extensively I got the impression that there is a tendency of taller or slimmer (Marathon runner type) people in the mountains while people who live in the flatter parts are often more compactly built - people in the Great Lakes Region in East Africa tend to have a similar built to people in the coastal areas of West Africa.
Possibly, but the genetics tend to be different. I forgot, but you can look this up, especially with the languages and DNA, but many of the S, W, and Central African ethnic groups have very similar genetics and builds, for instance the women havig phat booty (men too, but more pronounced with women) and nose and facial structure. The East Africans, well many have "sharp" facial features and the women lack phat booty.
For instance, if you look at Jojo Ntiforo who is from Ghana, he has the same physique as Flex, Melvin and Brian Buchanan, which would indicate that his ethnic group or ones related to that have similar genetics...
