The only way to tell the difference is by going to a psychiatist. I can tell you this much, if it was up to me my diagnosis would probably be diff. than what it really is.
There is some similarity yet their are various differences between the two illnesses. Also, there is significant diff. in medication.
Please talk to professional, and try not to figure it out yourself. Pdocs are very helpful sources, and they can give you more sources than the friends and member or people not trained in the field.