Mouthpieces are matter of a little personal feel, learning to know your own embroshure combine with the mouthpiece and sax responses. Mouthpiece chamber, tip opening and material made are some variables, my personal taste on low budget for alto sax i use Meyer #6 medium chamber, I get a good response with my YAS 62 and selmer Mark VII, for tenor I use an Otto link NY metal #7 on a Cannonball Big bell global series, I get a well balance sound.