Also remember these aren't the PA-28s and Cessnas we're used to pottering about in, they're ~ 1,500hp, heavy, vintage death machines.
Also what Ancient Seraph said, you can feel a gust or bump affect the plane and adjust to lessen it's influence on your attitude, whereas you cant in the game.
Liken it to Gran Turismo, they can put all the maths and physics in the game they wish and come out with a fantastic, authentic game which I love, but you can't 'feel' how much grip the car has or the forces acting through the steering wheel like in a real car.
__________________
|