As I said, an individual is an individual, even if they share what is called autism. I don't have his experiences, he doesn't have mine. My knowledge of myself is a defence mechanism left from when I was bullied at elementary school (which probably was due to autistic behaviour) and kept in tact by any later unpleasant encounter with another human. Without that experience, I don't think I would have ever been able to put down what I did earlier. Or, much like a big part of the ways I think would have never been had I not played RAMA as a child. Your brother has his own experiences that mingle with the autistic traits to form his person, which in return colours his autism.

Heh, if the situation calls for it, don't ever forget to tell him he has nothing to be ashamed of. ;)