I've had 'em both. My TH was powerful, but I started getting deadsticks like crazy. Would run great on the ground but die once in the air. No one could figure it out. When I deadsticked into a pond I ripped out the TH, sold it for $5 (because the guy wouldn't take it for free) and went with the TT. It has been the best running engine I've ever had. Smooth and reliable. And with the muffler from the TH it's one powerful engine.