I think a layman, at least in the US and countries that define race in similar ways as it is defined in America, would consider Khoisan and Bantu people the sam

I think a layman, at least in the US and countries that define race in similar ways as it is defined in America, would consider Khoisan and Bantu people the same race (black), even if they knew they were different groups. African Americans in the US often look different but are all considered "black".