I heard if you're into helicopter's you're better off with X-Plane as they can model more of the flight dynamics, I don't know how much that is true.
I am waiting on a new stick the X52 after investing into that I really want to get another sim up and running and am looking closely at FSX just don't know if I have the money to throw at it then onto X-Plane 10 some say its still in beta and reading the forums sometimes puts me off getting that.
As for the original topic FSX vs A-10c like other's have said there totally different Sims, I have flown FSX a few year's ago when it came out but not alot of time in it never went under the hood and played with mods or done anything serous, could someone list some good mods for FSX? Some free ones as-well? Hate being on the fence like this will most likely install FSX and play around.
Sorry if alittle offtopic.