PAGAN9JA:
America blacks are mostly mixed race people of slave descent.

British blacks are mostly recent African migrants.

British black are either 3-4 generation black British of Caribbean culture/heritage or Caribbean immigrant or they are 2-3 generation black British of African culture/heritage or African immigrants. When it comes to the British Africans, almost all are still connected to their culture, still go to their countries in Africa to invest and still connect to family there. They also have a very different mentality then American blacks.

African Americans are descendants of African slaves(also Caribbeans) that were brought to America, Majority of them have European and Native American in them as we'll and their culture is mostly American but it's a racial culture based on their race. Just like white Americans have a racial culture, since America is a culture based on race Basically. The only people in America who don't connect to the racial culture of Americans are immigrants and children of immigrants to a extent on how they are raised. Their mentality is different from blacks outside America, especially with Africans