For the first part, I would like to see the sources for this. Treatment in my country for BPD is DBT . Also sometimes anti depressants to deal with the often very depressing part of hating oneself for all the chaos they cause. I have had 3 psychs in 20 years tell me that meds are not given for BPD. Therapy and hard work is what I was told. Now, because I went manic when given prozac years ago, it was suggested I could be bipolar 2, but my current psych is cautious about diagnosing it as such because he feels BP is over-used as a diagnosis.
So, at least in Canada, treatment is not the same for both, and I have seen no test results that show both BP and BPD people have the same results from meds. -- if I missed them in your initial post i apologize.
Also would like to see where duration and energy level is up for debate. MAYBE alot of those BP are actually BPD and one day they will realize that with more extensive diagnosis.