The 9303 -is unique - the same setup for dual elevators is not used on any other US version JR radios
but the 9X is a software permutation of the 9303 (or vice versa)
I have the 10x and the 9303 - I like the in field ease of changes on the touch screened 10X
but the 9303 is really a much more versatile radio with a ton of really trick features.
all in all if I was forced to pick just one --the 9303 would be it