The difference between bipolar I disorder and bipolar II disorder is: Select one: a. the seasonal variation in the episodes. b. the number of depressive and manic episodes. c. the number of depressive episodes. d. the severity of the manic episodes. Solution biolar disorders are mental health problems mainly affects your mood. these disorders mainly characterzied by mania and depression. bipolar disorders are classified as type I and II. in type I is characterized by one or more manic episodes or mixed episodes (mania and depression) but is marked by extreme manic episodes. in bipolar disorders II is characterized by one or more major depressive episodes and at least one hypomania. as see above both types I and II there is occurence of depressive episodes but main difference is the severity of the manic episodes. type I -mania but in type II hypomania.