Based on those three criteria, you can't say one is best over the others ... For realism, I'd pick S3. Her body proportions are more realistic than the other two. For content availability, V3 wins hands down. Steph has some cool stuff, and Jessi is too new yet to compete in that category. Ease of use, I'd probably have to pick Jessi. It's easier to add morphs to her with the new P6 features.