Africa is the most diverse continent in terms of phenotype and genetics. For example: a West African, an Ethiopian and a San person have very little in common, physically speaking. It is a bit like saying African Americans are 'African' while most have admixtures with non-Africans.
Studies showed that Ethiopians (toward 50-55%) and Kushites (towards 35% for Bejas) have an important western asian input so they tend to look like transitional people.