If I had to guess then the pro series would work also with the Mars radio line. Since the size will remain the same and the pins arrangement remains the same the performance gain from the pro series is inside of the module itself, and really its mostly about latency speed.
p.s. have you seen the mini receiver that spektrum is working on. Also there is a specktrum thread that would have more info.
Team ORCA / ORCA USA / Pro Spec
Serpent America / Team Serpent S411 ERYX / On Point Racing OP12C, S120 / Xceed Products
Hangar 30 / Seattle RC Racers
Fasttrax Racing Series / NORA On Road Series