For racers who run the TCS in the U.S., Tamiya has come up with specific motor rule for Mini Class in 2016.
"You MUST use the REEDY 21.5 MACH 3 motor for this class. (Part #253) Note: YOU MAY ONLY use the included rotor and stator. The output shaft has the number 273 number etched on it for easy identification during post tech inspection."
There is no motor rule like this for F1 or GT3.