It's most likely shading that Jimmy talks about. It's hard to pinpoint just one thing, since the portrait itself is done ina more...cartoony way, than all FFT portraits. Clothing has harsh outlines, face shading isn't like FFT portraits either. What I like and think is looking great is the hair, but everything else isn't quite in FFT style.
Post a small sized version, and I will fix the face issues for you, so you can see what I mean.- nevermind that, you already did. Blind me