One thing that is cool about Steph Petite is that she can share maps with Aiko (in Aiko's Realistic mode) and some clothing as well with a little fiddling. Steph Petite also uses V3 mapping so the V3 Maps fit mostly on her, though I have noticed some oddness around the lips. My biggest problem with Steph Petite was that her eyes are too shallow and without ZBrush there is no easy fix. The rest of her is cute (you can scale the hands and feet).

Classic Steph was somebody dinking around with Mike2, and created a really tall girl out of him. She doesn't have quite enough hip polygons and she does look like she's got an extra chromosome, but Wyrmmaster made a nice add-on for her to make her more feminine and pretty (you don't have to use the DD morphs for the chest if you didn't want them) Sadly I forget the name, though I remember that the Steph Petite version was Amy Alps:-)