I have been motirored this thread with interest.
However I feel that V4 is the newer one the characters look to some extend like each other.
In the real life you get a variety of women and even the beatiful ones may have something that makes them less perfect and much more attractive.
For example if I tka a photograph of a person from front and I split it in two:
If i mirror the left and attach the left to the left mirror and I mirror the right and attach the right to the right mirror, I get two new photographs of the same person, but noticeable different. The reason is that our left and right side of our faces are different. You don't get this in V4. They just strive to get the perfect woman (Face) - I am not even going to the body.
Normally teeth is also less than perfect in people as well as th eyes.
I feel V3 better simulate this as some of the figures are less than doll-like and more natural.

Clothing is not a problem as there are some converting utilities that do convert clothing of V2 or V4 to V3.

Regards
Johan