I think there is truth in both positions . . . the audience MAY hear differences that the player doesn't because the player is being influenced by the feel and response of the instrument as well as the surrounding musicians in the ensemble, if playing in a group. While the ultimate decision is the player's, for sure, I always find objective comments from the audience interesting - and I do consider those from folks who I believe know the issues. True, it may be that some in the audience are influenced by extraneous factors, too.
I also think there is a difference between student and pro-quality instruments, even though good players can play a student-level horn and make you think it is the best instrument available.
3dBDown, for $4K you can come close to a new Ref 54 Selmer alto. Now there is a saxophone with which I can feel a distinct difference compared to other models. Not only does the Ref 54 have what I believe is a unique sound to the player (me, and I've played several of them, all of which had the same tone - an amazing accomplishment alone), it has a "feel" (meaning what my fingers perceive) that is unlike any other modern saxophone I've played. I don't mean to start a which-model-is-best argument here, I only cite that as an example to answer your question about differences among various models. DAVE
I also think there is a difference between student and pro-quality instruments, even though good players can play a student-level horn and make you think it is the best instrument available.
3dBDown, for $4K you can come close to a new Ref 54 Selmer alto. Now there is a saxophone with which I can feel a distinct difference compared to other models. Not only does the Ref 54 have what I believe is a unique sound to the player (me, and I've played several of them, all of which had the same tone - an amazing accomplishment alone), it has a "feel" (meaning what my fingers perceive) that is unlike any other modern saxophone I've played. I don't mean to start a which-model-is-best argument here, I only cite that as an example to answer your question about differences among various models. DAVE