And remember (those that may have forgotten) 2.4 GHz is more than a specific frequency in our case. It is a BAND of multiple frequencies and it is left up to the individual equipment designer to determine exactly which freqs the equipment will operate on or choose between or hop about on and in what sequence. MANY variables. Futaba and Spektrum may not be even using exactly the same frequencies but I have not looked.

One nice thing about Futaba:In the US, FCC part 15 on unlicensed systems in the 2.4GHz bands permits more power than non-hopping systems. The limit is increased from 1 milliwatt to 1 watt or a thousand times increase. The FCC prescribes a minimum number of channels and a maximum dwell time for each channel.

Yes, I like Futaba. But the Spektrum stuff works OK too. Not trying to start a war here so please don't go there.