I think to real-life standards almost any character in VAM would be considered "sexy".
Any element of a character in VAM can be easily edited... so blond hair or black hair; who cares? You can swap them around with three clicks. Body proportions are easily changed with a few sliders in "female morphs". As it is, I prefer the navel of the black haired girl, as it is deeper. That of the blonde looks purely texture and has barely any depth.
What takes way more expertise to edit is the face, and is the one thing in these screenshots we can't see.