Inclusion vs Exclusion. Inclusion vs Exclusion. Do you know what the difference is between inclusion and exclusion? Inclusion is the art of including, a state of being included. It is the relationship between two classes that exists when all member of the first are also members of the second. Exclusion is the act or an instance of excluding, the state of being excluded. So therefore, exclusion is to prevent or restrict the entrance of, or to bar from participation, consideration, or inclusion. Facebook Lives.