I like your new model (the first youve posted now). The only problem with the mesh:
- that cobweb formation above the ears
- the very straight loops at the inner brow area
- and that pulling up of the wire to the ears at her neck. The lower res at the sides of the neck would cause problems when rigging (the loops have also to follow the shape of the planned bending)
The shape has some nice attempts but its partially overdone - especially cheeks and jaw remind slightly on a potato (especially in 1/4 view) - get more subtle there and also your victim (your real model) will like it much more.
An other point is the rear half of the head, needing more attention.(the widest area of a skull is right behind the ears when looking from above) And keep an eye on the back of the head also in 1/4 views, looking somewhat strange at the moment. Plus give the model those nice ears instead of such large things (not reaching down that low at all).
An other tip: better to use tele angle lenses when photographing someone for ref - the center of the picture is otherwise enlarged due to distortion, getting then large noses, large cheeks, large ears, etc. If you dont have such a camera then do the shot from further away and crop the head later.