I have several African friends for years on years and from different countries in Africa, and I can say based on my personal experiences the differences between us are no different than say me and someone black from Cali or NY. The core values, interests, morals, religion, political views, music, etc are exactly the same. Like I said it is no different than a Mexican American from an Mexican. Again that is my personal experience.
We have talked on this before, that there are exceptions to this, like I have met people from Africa that felt they were superior to me (I dislike the term African American) and I know there are people here that feel they are superior to people in Africa, but there are people in NY and Cali that feel the same way, so like I said there is no difference.