Let’s understand the types of adoptions first.  A "closed" or "confidential" adoption means there’s no contact or identifying information shared between birth parents and adoptive parents. 

The difference in terms varies between "open" and "semi-open," but usually there’s more direct contact and communication with open adoptions.  With semi-open, there’s typically a liaison from the agency that helps facilitate communications and openness agreements. 

Think about what you want for the foreseeable future.  Here are some stories about open adoption.