East and West African culture are very different.
Yes, but I don't think the Afro-centrists will admit that--they construct an idealized African culture supposedly shared by all Africans (which never existed in real life), and attribute anything praiseworthy elsewhere to African influence. For example, Aristotle stole his ideas from the library of the black Egytpian pharaohs, etc., and the Olmecs were really Africans who brought the idea of pyramids with them, that sort of thing.
Africa probably has more diversity of human DNA and human culture than any other continent (although maybe not as much linguistic diversity as Asia).