In my opinion, it just had a ton more tech for relatively the same price. I got her the 2010 model, so it was like $260. Even if the price was more than the K2, i'd still get her the Gnu. Its flexible and forgiving enough for a new rider, but also has the tech to back up a intermediate rider.
Thats a really good price!! I would pick that over lunatique if thats the case too!
Now I have brought b-street into the picture, (b-street cheaper than b-nice because its on sale), I'm even more confused.