the biggest difference between any of them is the b.s. from the people who manufacture them. i don't believe that the turkey give a damn one way or the other as all turkey sound the same but all sound different. if really worried, buy one single reed and one double reed and when one doesn't seem to work, try the other and or mix them up. don't get caught up in gizzmos unless you feel sorry for those selling them. spend your time and money locating turkey, problem solved

cheers