I've written heaps on this subject on BB in the past, so suggest you do a search on here as you'll find some great information.

For my 2c worth - I think hypnobirthing and calmbirthing are the same given they have exactly the same positioning and focus on your birthing outcome ... to birth your baby without fear and with confidence. The methods might differ slightly, but essentially you are learning the same tools. For me, it was about education, empowerment and confidence.

I had two amazing, empowered births thanks to hypnobirthing. My second natural, drug-free birth must have been a rarity in the hospital I birthed at as the lovely midwife (who had been trained in how to assist hypnobirthing couples) commented how nice it was to see a woman give birth naturally and calmly. Apparently I 'inspired" her. LOL. I didn't intend to be inspiring, I just wanted to birth the way I knew I could.

Good luck - hypnobirthing/calmbirthing is worth it's weight in gold.