Peter,

I guess it depends on the manufacturer, or "what's in a name?"
Stunt planes tend to be more for "fun fly" type aerobatics, and sport planes are generally more "scale" looking, and for general flying-both are good second planes.
Also, you could pretty much set up either for your type of flying by how much control throw you use, power, ect. The "stick type" planes generally have the shoulder wing, although the wing is more toward the center of the fuse compared to a trainer, whereas the "sport" planes tend to have low wing, canopy, cowling ect. Both types usually have semi-symetrical wings, as where trainers have flat bottom wings. Trainers land a little slower, and don't do very well upside down, stick and sport models are more versitile.
The choice is yours.


Jetts