Are there any major advantages for either? what are the differences?
Okay, Stephanie is just over 5’ tall in both default and curvy, 5’6 in Model. Victoria is 5’6 in defaullt, 5’9 (i think) in Supermodel.
They have VERY similar UVS! SIMILAR, not exactly he same!!!!! The are just different enough that using a Victoria 5 map on Stephanie 5 UVS might be a problem. IMHO, I think making Stephanie 5 Textures is a loosing proposition. You should use the Victoria 5 UVS instead. FORTUNATELY you can. Riley for Stephanie 5 by the gloriously talented Vyktohria is stunningly beautiful… and Vyktohria was smart enough to use the Victoria 4 uvs, which makes her Riley for S5 textures and material injection scripts usable by Victoria 4…
Bottom line is this: since we have so many options with Genesis UVS, it sort of becomes a non-issue… unless and untill somone starts producing textures for one of the other UVS sets.
My advice on Stephanie 5: buy her. She’s worth having as a default base even if you don’t have Victoria 5.