I think "the eyes have it" in this photo. The more frontal shot and larger eyes really work well. Compared the your Freestudy shot this one shows a more open expression, which I find more inviting. I think the sepia tone works well with her hair, lips and eyes. It does have a funky effect on her skin though.
Wow! As much as I LOVED the one you entered in the challenge, I think I might be with Deb. There's something about this one that is even more compelling and beautiful. I love the rich reddish tones. And her expression seems so relaxed. This is flawless!!!
I think I like this one better than your entry because of her expression and the lovely bokeh reflected behind her. I might add that I quite liked your entry as well.