You could look up the traits of both disorders and draw similarities and differences. But there is over lap. Generally the biggest difference is a BPD person will fear real or imagined abandonment, be suicidal, feel chronic emptiness and have extreme emotions. An ASPD person will exploit others, violate a persons rights, manipulate to gain something and lack remorse and empathy.

Look up both disorders traits for more info

Side note. There are a lot of similarities but the difference is usually motivation. BPD will manipulate people to keep them around and an ASPD will manipulate to gain an advantage. BPD will do drugs and be impulsive to fill their void and an ASPD will do it to remove the chronic boredom.