mdjohnson,

Do you have the Budd's laser tool? If you have it just get both servos and try how close the servos go back to center. That red dot has to stop in the same place every time. You will need to set up equivalent mechanical advantage for both servos and radio set up has to be exactly the same. For example ailerons. The second check if you have time and money fly the same plane with both brands and check how easy or difficult is to trim the plane. You will be surprised that the laser test confirms the trimming test. Please don't ask me how I know.

Good luck,

Vicente "Vince" Bortone