In addition to what Strixowl said, the breasts can be maneuvered to better fit your pose. It is most definitely NOT the same product. I have both, and I can assure you that both characters are very different. When you purchase a VV Dynamic Deformer kit, you are not just purchasing a charcater. This is a set of body shaping and manipulation tools that also allow you to fit most clothing with just one click. The VVX kit has further enhancements to adjust clothing to fit properly, like the area between the breasts. Most morphs, and previous versions of the VV line deformed the clothing to the near exact body shape, including the clothing area between the breasts becoming close fitting to the figure. Now, with the use of tools called "remotes", you can adjust not only the individual body part shapes, but also adjust the clothing. This is an AMAZING product. Sarah Spriteling is another one that I could not live without. While VVX will give you that voluptuous hourglass figure, the Sarah Spriteling will give you a wonderful petite to tiny character, breast sizes ranging from graceful mounds, to neat, sweet, and petite. Wyrmmaster's deformers are tool kits. The character faces, and preset body shapes are a nice bonus for ease of use, but the tools are invaluable. I rarely bother with body morphs any more, and only use them if the clothing itself requires it.