Well, first of all, Ingenue Vickie is much, much smaller! ;-) They are both based on V3, incidently, IV predates SP, in fact she almost WAS SP, DAZ was going to buy her, but we finally disagreed on the high-heel feet, DAZ didn't want them, but all my figures have 'em. Even allowing for the difference in size, IV is rather more slender and less statuesque and curvaceous. Audrey Hepburn was the figure I had in mind when I made her. She is the smallest adult Poser figure available.