I've given my son a Tiger Shark 46 R/C that runs like a champ in his low winger. Seems to run just like an OS, but not as strong as an SF which is very torquey. Hauling that 4 1/2 pound ARF around no problem.
As far as Stunt goes; TT and Magnums run like an OS FP, 2 stroking with 4 pitch props. Many try to run 6 inch pitch on these and bog them down, it's a waste of time to try. The TSI's should be the same.
Chris...