While I've no experience of the CST bodies I do have one of their Mila heads (Ava). This head is easily the most detailed and frankly impressive head I have and once I found a better way to light the silicone Ava has given me some of my fav pics during the last year. While I decided to add freckles with FaceApp the detail such as skin pores etc is there plus the head has implanted eye brows, high quality eyes that can be moved by depressing them slightly and of course there's the implanted hair that feels to be good quality and hasn't shed significantly as the silicone is a very firm blend. I'd definitely recommend the CST heads based on my experience, especially of you are looking, primarily, for a photo model.
Cheers
Dean