Hello, I am trying to help a student of mine pick out a mouthpiece for future studies. He is at the point where he doesn't need to worry about equipment, but rather, have a consistently made mouthpiece that'd work best with his horn. While I use and personally recommend the Optimum for its dark, smooth, and very focused sound, I know that Rousseaus supposedly work very well with Yamaha saxes. Compared to a Vandoren TL3, how would a 4R/NC4 respond in terms of brightness, projection, etc? What in terms of their performance makes these mouthpieces so great for Yamahas (besides the fact that Rousseau designed it in conjunction)? Also, is it true that the original Classic series was built for the original 23/62 style necks where as the New Classic series is built for the G3 style?