most of the Firebirds ive known are two channel :S

my bad looks like they are both on even playing fields then, although im still not sure about re-usable innards they must both use the same type of guts,

the only other thing i can think of is the Propellor, the firebird has a rear-mounted pusher prop and the design should help save the prop in a *cough cough* "Heavy landing"