That's a very pleasing shot overall, but there are a couple of things I'd want to change.
Firstly the chair looks like it's edging its way out of the shot - I know it's not the subject matter, that's just the way it feels to me.
Secondly, her head is vanishing slightly into the backdrop - perhaps a small adjustment to the lighting to make sure her whole head has a bit of rimlighting would provide more separation.
I like the other one better. This one, with the position of her body and arm, makes her tush and hips look wider than they are, but I love the lighting on her and how you've highlighted the bottom of the dress. She has a beautiful profile!
Very nice! The chair is no bother at all, though I do wonder about her right hand. And... we can ALMOST see a bust line. Hmmm.... I'm thinking either so it or not.