My general observations from observing black and white bodybuilders....
observations....not racism. 
of course there are exceptions.
Blacks - Positive - Generally smaller waists, smaller joints, rounder muscle bellies, "fuller" "rounder" look to the muscles. Longer muscle bellies.
Negative - Poor calves and forearms - shredded and hard, but not often dry - often watery.
Whites - Positive - Good calves, forearms, more grainy appearance due to less water retention. "thick and dense" muscles
Negative - Wider waist and thicker joints,