Ditto, TLD! Co-worker and I get mixed up at least once a day. We don't even work on the same floor and never have. Racial nuances aside, there's no reason for us to be mistaken for each other.
Me: Lighter-skinned, medium length natural hair, curvy
Her: Dark-skinned, long natural hair, heavy
One day, she snapped and yelled, "Oh you think I'm CG? Cuz all the black people look alike, right?"
I can tell the difference between a Chinese and Korean name before I can a face. I just don't know the features well enough to do that. I know that they look "different" but I never remember which features go with which label. I think that, in general, it's the Europeans who identify by their country of origin anyway. The general population don't usually bother to get any more specific than African-American and Asian-American, Latino, etc. On average, I think a white person will be quicker to point out their Irish ancestors than a Black person will pinpoint Madagascar (noting that part of this may be because a good percentage of Black people don't know from which country their ancestors came).
ETA: Dang, y'all replied fast. The "Ditto" was aimed at TLD. And I see what you're saying DP, that makes sense.