which type of mouthpiece is better for jazz playing? Rubber or meta?

Again its all on what you like or what you prefer.
I use a metal for Jazz, but there are many players out there who do not. If you do want to play Jazz though, avoid classical mouthpieces.

Later

all depends on the sound you want. If you`re playing classical it`s almost a must to go with rubber...in jazz, I personally use a metal. I use an Otto Link Super Tone master metal mouth piece for my tenor (which I use for jazzband), a bundy rubber (forget which one) for my alto/tenor when I`m playing classical.

However, in jazz, you can also use rubber. Depends if you want a more smooth, bright, mellow or what ever sound. I personally, prefer a bright sound..but need some laid backness to it. This mouth piece seems to give that to me. Rubber jazz mouth pieces tend to be much more "laid back" or mellow...great for ballads, infact you should almost never use a metal in ballads. Or if you really need to focus on intonation for a specific song, rubbers are good.

It all comes down to playing style. I personally use a metal, but that`s because I have reletivly good intonation up to about my high b, and I can control it in the palm keys...it just gets uggly in altissimo register. However, my alto I have less control. Also, it also depends on what sort of music you play, in addition to just jazz, is it swing, dixiland, big band tunes. It all depends. I suggest you try a few out, and find one that fits you. That`s what I hadta do

It really depends on what "feel" you like. I play exclusively on hard rubber mouthpieces because they feel better for me. I play jazz. Metal mourhpieces are usually more projective, but some rubber pieces (JodyJazz, Lakey), are more projective than metals. Try a few out.

like all those guys said, play a MP that feels right and sounds right to you

rubber is pink

rubber is pink