Some of it is determined by racial characteristics, I know a young woman of Indian (west Asia) background who has a lot of wispy hair down the side of her face, and have seen similar in other women from the region. My electrologist said she would "feather" my hair in that area (that is, a soft edge rather than a hard sharp line common in male haircuts, looks similar to that pic posted above) - she's had a lot of experience with trans women over the years and I have to say the look is totally spot on.