- you can use all V3 skins on SP - poses need some tweaking - clothes are normally not exchangeable. To get a more "real" looking V3, you would need to do a lot of tweaking and saving morphs (changing sizes of individual polygons). SP is very versatile, less stereotypic than V3, and more "human". Her weakest point is the head. There are tutorials around (and it is not difficult at all!) to use V3's head on SP's body. This gives you a very good combination as you get the best of both. I am personally very happy I purchased SP.
I have tried prudent planning long enough. From now I'll be mad.
(Rumi)