Yeah, but a lot of that is personal preference. Double mouthpieces take a little longer to get used to. Good mouthpieces are really there to keep your teeth from banging together and breaking.
I have both, but I personally prefer my single for most of my training. It's a lot easier to deal with, and when I really start to gas, it doesn't constrict the breathing as much.
It doesn't matter if you agree or disagree
... As long as I don't bore you and I spark a moment of thought, my goal is achieved
Queng leon queng tigre ecu tacacut, queca pa? - Pampangan Mandarigma Motto