not correct. chemically they are identical. Hemp derived cbd tends to be contaminated more because there is an abundance of cheap Chinese imported cbd. Chemically one is not superior to the other though.
CBD alone tends to be fairly ineffective from what I understand. If consumed orally, pure CBD needs a very high dose to be effective, something like 10-20mg per kg of body weight. However, when combined with thc it becomes effective for most with only 2.5mg thc and 2.5mg cbd. This is reported by Dr. Ethan Russo. Also, GWpharma just recently came out with a seizure medication called epidolex, which is dosed at 10-20mg per kg of body weight.
I'd recommend you check out Brandon Allen's IG page(
link) if you are interested in this kind of stuff. He recently pointed out that there actually isn't a lacking of evidence and peer-reviewed studies about cannabis. If you search the US National Library of Medicine, you will find over 18,000 results(
pubmed. You can use
http://sci-hub.tw/ to access published studies that are not free. Other countries like Spain and Isreal have not had prohibitions on studying the plant either. I'm sure there is still a lot of be learned and discovered, but it isn't some highly mystical plant as often portrayed.
All medications have side effects which define the therapeutic value(positive vs negative effects). Cannabis is known to have some in particular that can make something like bipolar worse. "...the consumption of cannabis has been associated with increased risk of psychosis in adolescents, and may be associated with an increased risk for developing bipolar disorder and anxiety disorders."
www.ncbi.nlm.nih.gov/pubmed/30055217