You I noticed the same kine of thing when I started using the old but still well loved V2 and that is that all the face and body images of her looked the same no matter who rendered her in images. I have to say that I was convinced as I am convinced now that a lot of people just don't take the time to really learn the body and face morph/phenome dials.
I know almost all my renders of V2 show a different look and I have a lot of textures, freebies and bought and many I have rigged for personal use that contribute to the "Different" looks of the figures I render. If more folks took the time to learn and use the dials, working with both V3 and the "Plasticized" V4 the figures might look better and perhaps more realistic.

I for one have seen many renders with V4 that look marvelously life-like. I think it depends too on how she is rendered. The applications used also make a difference and the use of lights too does wonders. I loved the hefty V3 body structure...real B.S.H. (you either know what that means or you don't !).
The V4 body and face are more "waifish" and skinny though I have seen some awesome body morphs created for her. Her shoulders look so much better than V3 though and from what I have seen her joint parameters are also better.