Why would you want to be like your brother? Don't change who you are to please someone else. Just be you. Why be a copy of your brother, when you can be an original you? (That's something my therapist used to say to me. Except i wanted to be like my sister)
Take it from some one who has always been compared to his brother. You just have to do your own thing and make you your own person. Be cool for who you are and what you do, not for what your brother does.