I am mixed race, dark hair, dark eyes, olive skin. Dp has dark hair, dark eyes and olive skin though he is clearly white and paler than me. But our features aren't similar and he is 6ft 4 and I am 5ft 7.
He has quite a prominent nose, I have a very small nose. I have quite large eyes, he doesn't. As well as tall he is very broad shoulders, hands are massive, wrists are etc and I am quote petite.
Oddly though when I was with exh, whenever we went anywhere as a whole family so my mum, dad, dbro (when he was single) me and my husband people wokld often assume that dbro was my partner rather than exh.
I was sat a counter having breakfast in the US sat between them and we were talking to the staff, when it was mentioned. So not like I was sitting with dbro or anything. We had it quite a few times, despite the fact that me and my brother do look quite alike.