Everyone else isn't quite as great as I am, of course.
Just kidding... if this is asking about me personally, I would say that I am different because I have a unique way of looking at things, not always a good thing. I am a self proclaimed and proud pessimist and always a realist, but ironically tend to bite off more than I can chew with ideas of grandeur. (example - our engineering club in high school had a budget of around five hundred dollars, I as president of the club proposed and began three projects which would each cost 2-5 thousand to finish) Also, if this makes any sense, when asked in an interview to say three words to describe myself, I responded politely to the woman conducting the interview that I really didn't like the question, because anyone who could answer that question honestly and say how great they are probably are really stuck up.
As humans, everyone has their own traits due to this wonderful thing we like to call genetics, but even given the situation that every single person were born with an identical genetic code, no one would be truly identical, their personality and their ideals would be changed with every unique experience they have had.