DD swings a Xeno and loves it, if I got a better deal on a CF5 she would swinging that and love that too.
They are both great bats, I do not think $30 would be the determining factor.
I am not sure what your DD swings now but she will love either one of them.
Do you like apples or pears?
My kid loves her CF5 Insane. Lots of pop, and we may never buy a different bat type. When we were at the Colorado Sparkler this summer, we ran into a couple of coaches that said after a while the Xeno seemed to have lost some pop for them...and that their girls would only swing the newer Xeno's. Just relaying what I heard.