RE: What is the difference
Sounds like you got a good one as far as the girl friend area is concerned! The trainers with flat bottom wings are generally quite docile and have more of a tendancy to self-correct back to a stable flight attitude. That can certainly be a " pro " when you`re first learning. What you give up ( "con" ) is maneuverability. The Boomerang, however, with it`s semi-symmetrical wing, will give you the ability to experiment a bit more with aerobatics. It will also be somewhat less forgiving than the others, but not tremendously so. Sounds like you`re well set up to begin!