Neither is better and neither knows more. It is the experience that is the difference. I am an ADN prepared nurse and have been an RN for three years. I am now in my last semester, actually my last month of an RN-BSN program. I have yet to find what the difference is other than some extra busy work. The only reason I have pursued my BSN is because I have to have it to get my masters to become a Family Nurse Practitioner. Do what works for you. If ADN's were to get knocked out of the system of entry level nursing, they would have done it a long time ago, I think. Besides it is never too late to go back later.