I've never played an M30, but I played on an M13 while helping a friend pick out a mouthpiece, and it was pretty nice. Sweet, compact and clear tone. The only other Vandoren clarinet mouthpiece I've played was a B45, which I thought was too open and needed reeds that were too soft for my tastes, which, for me, resulted in a tone that was a little too spread, too bright and not loud enough.
For that price, the M13 is hard to beat. Still doesn't top my Borbeck, though.
For that price, the M13 is hard to beat. Still doesn't top my Borbeck, though.