Dr. Elsa Ronningstam presents a very detailed lecture about the symptoms and Traits of those with Borderline Personality Disorder and those with Narcissistic Personality Disorder. She also discusses the difference between BPD and NPD.
Video is courtesy of the NEA BPD YouTube channel
This video has very good information and lots of it. Unfortunately the good Doctor is not that great a presenter. Might I suggest to break up viewing this video into 10 to 15 minute segments.