Re: Whats the difference ……
You are perhaps only looking at the physical side of “what people are getting” by performing religious obligations. The peace of mind that a momin gets after performing his/her religious obligations in a good manner has no comparison. This is just a small token though, as the real prize will be in the hereafter.
Moreover, ibadat just for the sake of it being compulsory is mostly meaningless, one’s heart has to be in it. Without that, its just an exercise.