Err what is the difference between Nigerian men and African men?
There are many different tribes in Africa with their own physical attributes.
An Ashanti is notably different to Xhosi.
A Zulu is different to a Shona or Ndbele.
The Masai are generally recognisable anywhere usually because they are generally tall and thin. Quite different to the Luo who were once described to me as the the nearest modern man gets to Neanderthal man.