How are bipolar disorder and borderline personality disorder different?

Bipolar vs Borderlin: Bipolar disorder is a mood disorder consisting of both depressive episodes and manic or hypomanic ones. People with bipolar disorder often have normal personalities between episodes of illness. Borderline pd is a pervasive and continuous (not episodic) personality pattern with volatile relationships, extreme anger, fear of abandonment, self-injury, identity diffusion, impulsiveness, etc.

Borderline: Intense fear of abandonment, being manipulative, impulsivity, a tendency to think of people and things in all good or all bad terms, self mutilating behaviors, drug and alcohol abuse, sexual impulsivity, a profoundly disturb sense of self, and extreme emotional volatility. Bipolar disorder is characterized by extreme mood swings from deep depression to the stratosphere of mania.