From my understanding the fasst compared to the spektrum is the fasst is continously searching channels where as the spektrum finds a channel locks onto it then if someone were to switch on their transmitter with that channel the spektrum is on the spektrum unit shuts down for 3seconds? to find a new channel (not so good for a gas car
)
Im not to sure which one is faster but the futaba fasst is awesome, I have one with my 3pks, it works great
