yes, the FHSS-3 is faster, but also has a better receiver all around. the 2 had problems with the bind button breaking and not being able to be used anymore. but most people cant tell the speed difference between the two. i mainly got the 3 receivers because of the better bind plug, but once i used it more and tried a 2 i could tell it was slower.

also on TC5, i think he is talking about how airtronics you can adjust the tension on the trigger and steering wheel with an allen wrench without taking apart the radio, its really nice. i loosened mine up. mine is the M11x though. however my dad uses the MX-3X, he really likes it. i didnt like it when i had one, it was lighter than m11x and i like where the wheel is on the m11x, but other than that they perform the same.