This came up once.
I had a friend who had a lover who he claimed was my virtual twin.
The lover and I eventually met ... and the resemblance was uncanny and unsettling.
Nothing happened, but there was big chemistry.
The thing was, while the physical resemblance was startling, we weren't at all the same as people. More like polar opposites.
So it's hard to say if the resemblance appealed, or the difference.
(I think it was the combo.)