I use both the Flightaware ProStick Plus and Radarbox24 FlightStick. These perform more or less same.
The difference is in location of SAW Filter chip. In Flightaware, it is after the LNA, while in Radarbox24 it is before the LNA. At some locations FA performs better, while at some other RB24 performs better, depending upon Cell/Mobile signal at the location of use.
Following post may give you some insight into the Cell/Mobile interference issue:
RF Scan of Various Combinations of Dongles, Filter, and LNA