If you have both you are in a good position to educate us in the difference.I have two Phantom 3 Pro's, one has the 300A controller, the other has the 300C controller. What is the difference, is one better for long distance flying or are they basically the same?
If you have both you are in a good position to educate us in the difference.
Fly one p3p with the A model, then tether the C model to the same craft and fly the same path to see if there are any noticeable differences. Try for max flight distances.
Report your findings here.