I assume you mean that I was rude by stating the truth. The fact that you don't know this very basic information is scary to me as we are dealing with people's lives, but in no way was meant as an offense towards you; someone or some others have not prepared you well. As you use the terms they are the same thing, but it is a little like asking 'what is the difference between an appendix and that that little useless thing on the end of your large intestine'?
Both terms are legal, and bound to practice law for every healthcare profession. Confidential referes to the nature of the information we receive, while privilege refers to who has the legal right to release or share such information. For example all info we receive in confidenital with exceptions like child abuse, imminent harm to self or others and sometimes gross inability to care for oneself or make decisions, but for adults privilege remains with the patient with the above. However, with adolescents privilege may be with the legal guardian or parent(s) which varies by state, and with kids it is always with the parent(s) or legal guardian. There are many other variations. Violation of these legal concepts is the number one reason for board actions and lawsuits.
I apologize for being blunt, but this is serious stuff.