Lookin' good, action. The first one's really great - except for the sketchiness that ven touched on, the only thing I could nitpick is that her ankles seem a bit big for her bodytype. The second one has a few more problems, such as the slightly skewed angle of the head. I understand she's supposed to be looking up, but all I can see is a broken neck. Her arms, wrists, and knees are kinda chubby, and her arms a wee bit short, making her look kinda young - which is a little odd combined with the adult breasts.
I hope I don't sound too nitpicky. They're interesting designs and it looks like your anatomy's improving a ton!