I'll throw out a novice's observations, before the more learned answer. I'm really interested in this, it is a great way to ask the question.
I moved from B55 to D97 to enhance performance and durability. I found little difference in noise, which was easily tamed with good silencers. I then tried BCY-X, and found the performance, and the stability, were more enhanced than from the switch to D97. Again, noise was not an issue - same as others, it was more a result of the bow and arrow tune than material. I am really a fan of the BCY-X now. I am in the process of switching all my strings and back-ups to BCY-X because of its performance with no sound side-effects.