There are big differences and please check
www.islamway.com
www.islamhouse.com
here is a qoute for those who are interested:
"Each person is born in a circumstance which is not of his own choosing. The religion of his family or the ideology of the state is thrust upon him from the very beginning of his existence in this world. By the time he reaches his teens, he is usually fully brain-washed into believing that the beliefs of his particular society are the correct beliefs that everyone should have. However, when some people mature and are exposed to other belief-systems, they begin to question the validity of their own beliefs. The seekers of truth often reach a point of confusion upon realizing that each and every religion, sect, ideology and philosophy claims to be the one and only correct way for man. Indeed they all encourage people to good. So, which one is right? They cannot all be right since each claims all others to be wrong. Then how does the seeker of truth choose the right way?"
complete article here:
http://www.beautifulislam.net/tellmemore/true_religion.htm