Oh, another thing.
You see how on the left one's pant legs, they curve up? as if you're looking up at them?
Well, you drew two conflicting angles. At her upper chest, you're looking down on it. Because this part is under the implied horizon, anything under it also needs to be looked down on. Basically, you need to make the pant legs curve downwards, as well as tweak the view of the shoes.
On the left, with the ribbon on the left leg, just make it a bit more rounded, as it looks really flat right now.
These errors are a bit trivial here, but angles and roundness really make a difference.