| Bipolar I disorder | Bipolar II disorder | |
| Manic episode(s) | Yes | No |
| Hypomanic episode(s) | Commonly occur, but not required | Yes |
| Major depressive episode(s) | Usually occur, but not required | Yes |
| Mixed features | May occur | May occur |
| Anxious distress | May occur | May occur |
| Rapid cycling | May occur | May occur |
| Psychotic features | May occur | May occur |
| Catatonia | May occur | May occur |
