bipolar type i disorder

How many types of bipolar disorder or mental illness are alike?
Could you please provide the names and the way different here =]
Severe bipolar I mania / severe bipolar II depression severe depression / mild mania (hypomania) Cyclothmania depression more mild / mild mania (hypomania) and usually shorter episodes III are also bipolar which is generally used for that doesn't quite fit into the other 3, but still is clearly related to bipolar disease. Also called "bipolar not Definde" I think
Mental Illness