Joe:
Look for straight flight that slowly curves off one way or the other and rolls that rotate faster on the first 180 degrees than the second 180. It will want to roll back out of knife edge, also. Those are all characteristics of not enough dihedral in a low wing aerobatic plane.
I don't think the differences will be dramatic. The stock Taipan will probably just not feel as "locked-in" or "true" or "on a rail" as the Ultra Sport.
Jim
Last edited by jrf; 07-09-2014 at 09:32 AM.