Barry:
I would select the Scooter based on wing loading... I live at a very high altitude place (Mexico City, 7350 ft. high) therefore we need to fly very light and slow planes, since them will have to be flown faster here, just to keep them from falling from the sky.

The Scooter has a lower weight since it is covered with Ultracote lite, the structure is light and the wing has more area also.

I have the Scooter since I also had a new AP-09, and there are not many kits or ARF's available for this particular engine... I examined a Schoolboy at the hobby shop when I bought my AP-09, but preferred the Scooter after comparing the numbers.

Good luck with your selection. BTW, my AP-09 runs beautifully (only bench tested). Less power than a TD 09, but much more user friendly and has an excellent carburetor and throttle.
Regards, Alfredo M. Claussen, Mexico City.