Belated but still relevant: this is what RD claims for the Fuelx Pro+:
FuelX focuses on rideability and helps the engine run in an optimal condition, with a much cooler operating engine temperature and fewer gear shifts incidentally resulting in better throttle response gains at the lower RPM - lower throttle percentage region. This initial gain helps the engine to eventually achieve better response at higher revs as well.
FuelX is a fuel optimizer and it autotunes the engine to the best operational parameters, constantly monitoring, learning, and adapting to the engine condition, wear and tear, riding style, add-ons (such as air filter and/or exhaust), etc. as well as the environmental conditions such as temperature, humidity, altitude, etc. always ensuring the engine performs in the safest and most optimal zones.
FuelX has complete control in the closed loop and partial control in the Open loop to a certain limit As a result, the engine will be running in an optimal condition, with a much cooler operating engine temperature and fewer gear shifts incidentally resulting in performance gains at the lower RPM and throttle percentage region. This initial response helps the engine to eventually push more at higher revs and throttle percentages and provides overall performance.