I enjoy both games, X-Wing a little more at the moment. I feel they play different enough, especially when it comes to fleet building. Attack wing is great as a casual game, and easily allows multi-player and cooperative play.
I don't mind the scale of the ships and the models, for the most part, are of good quality (took like 5/6 releases to finally get a correct D7) . Thave decent details, but the paint leaves much to be desired.
I also only play faction pure, and will never consider playing in an OP event.
As for a game with the feel of Star Trek, Ascendancy looks intriguing.