First of all let me tell you a little bit about Microsoft flight simulator X. Microsoft Flight Sim originated from computer graphics and gradually went on developing and updating their version. These newer versions were improved periodically by adding different features to the simulator.
The version 9 of the MS Flight Sim was released in 2004 and perhaps the only one to have a single edition of the simulator. In the year 2006 MS Flight Sim went on to produce the X version called Microsoft Flight Simulator X.
Reported by the official Microsoft internet site, the standard version with this version features anything from navaids to GPS. It gives you eighteen airplane options, 31 cities to fly in, as well as 40 airports to fly back and forth from.
What about ProFlightSimulator?
This is software that has a massive Selection of Aircraft's and Airports - There is over 120+ Aircraft's to choose from; airplanes, helicopters, fighter jets, airliners, propeller planes, etc. Also there is over 20,000+ real world airports to take off from or land at.
Extremely Realistic Flying - Terrian, aircraft reactions, planetary alignments and movements is based on actual world data. When flying at night you can see car headlights on major roadways, and accurate airport lightning.
I've played just about every flight simulator games and not any of them measure to this one. The details and scenery is incredible. They made this game to be as close to real flying that you can get and they did a extremely well job.