Your dog definitely looks like a Yorkie to me. I had the same question when I bought Lily because she just looked different than other yorkies. As she's grown up, her coat grows slowly but surely and to be honest, she has the sweetest, most loving temperament. I think Lily's face is gorgeous and so is your dogs.
Enjoy her and her uniqueness.
Here's a few pictures of Lily as a puppy and at a little over a year old or so....