@Steve: That's getting better - thanks. If you now have a deep look into AFP, G2, CSM, TF ... and you find that you can merely start and land the aircraft at ANY place and if you consider that flying is fairly easy - getting it into the air and back onto the ground safely is the problem - than you are close to the real difference. We simulate the bumpiness and the resistance of the ground - whether it is high grass, low grass or concrete. That "simulates" the real problems a starter has getting a 2-wheel gear down safely or slipping with the heli over the ground or even breaking the tail rotor in high grass.

Please do me a favour - download the demo and just watch the demo flights.

We are now in a detailed discussion. Comming back to the original question we may conclude: Yes - there is a big difference in physics and one hint for that is the price. I agree with you that some prices are not justified or some prices may cover a good part of something that is not really needed or heading in the wrong way. Commercial products usually offer more value for money than FOC products.

@rajul: You are that guy with the profund knowledge of the US market and how it works so you are leaving no opportunity to teach other people?

Why can't you just wait and see before you are talking about things you obviously have NO knowledge about?