Difference between bipolar 1 and 2?

Bipolar 1 : A person with bipolar 1 disorder may or may not have a major depressive episode. The symptoms of a manic episode may be so severe that you require hospital care. Bipolar 2 : involves a major depressive episode lasting at least two weeks and at least one hypomanic episode (a period that’s less severe than a full-blown manic episode).