Hello Jugal, not sure if you meant to put that question in to one thread or not but I'll have a pop at it.... The difference between power and priveledge (terrible sp again no doubt, I have a mental block on that word) I think is that you can obtain power but I think you're born in to the other thing that I can't spell.
If your question is what is difference.... well it's anything that goes against the established norm or not part of a grouping you identify with. Difference is actually a lot harder to find than similarity in my (limited) experience.