Lamaze or Bradley classes???

Sahiba • 1st baby due April 30th
Hi, I'm trying to choose a prenatal glass and there are just so many choices out there!! 
This is my first pregnancy (I'm 37yrs) and I'm pretty clueless. 
I'd prefer a natural birth - I do yoga and am getting some hypnotherapy - but will take meds if needed. 
Does anyone have any preference between Lamaze and Bradley classes (or anything else)? 
Thanks so much :)