Love the way you use color, can't decide which version I like better. Only one thing is bothering me, the proportions of the body are off. On the poses you use where the model is reclining and you have some visual distortion the legs (which are closer and should be larger) are too thick, and the torso too long.
It's a small thing but if you took this image and made the distance between the belly button and the groin shorter and added a more pronounced crease where the right hip is forward and rotated it would radically change your proportions and make it look more 3 dimensional. And because your slit is high you should also be seeing a little crease where the butt cheek starts, more like in your Vampirella image.
I found these great positing guides for boudoir photography that might make good reference material for you: