Il 2 Sturmovik: Birds of Prey-Game vs reality!!!

[Ancient Seraph]

Well, the reason that the real aircraft seem to fly much smoother is because there's actual pilots piloting them, and on a console you have no feel for the airplane. This way you can't correct turbulence etc. until after you notice your attitude changed. In an airplane you'll feel this right away.
It's true it's impossible to perfectly simulate flying at home, but sim mode is definitely the closest you can get (especially on a console) .