My opinion is somewhat biased because I only own FS One. A friend did loan me his AFP Deluxe and I spent several hours on it. Between the two I definately like FS One better. Planes seem to fly more realistic to me on FS One. To me the planes on AFPD seem to floaty. Any of the sims I believe will help you to actually fly RC better. I can tell I am better after practicing with FS One.