I don't know, people always say they are so similar, however outside of the mood issues I am just not seeing it from my own experience only I am speaking of
I don't have the symtpoms that come with borderline, outside of mood issues. I am not particularly irritable, angry, bitter, or have outburts. I don't value and then devalue, don't have abandonmemt issues etc.

To me they look quite different. Especially on the relationship end of things. I don't see why people can't easily have both.