Is this about clarinet mouthpieces made of metal; or is it about mouthpieces that would work on clarinets made of metal? I have never seen a clarinet mouthpiece made of metal. Doesn't mean they don't exist, but if they do, I'm guessing they aren't very popular for a reason. There are SO many great mouthpieces made out of hard-rubber, plastic, and crystal that I just don't see the need for a metal one.
And frankly, I don't think that a metal mouthpiece makes all that much difference on saxophone, either. I believe the design of the mouthpiece is the issue, not the material from which it is made.
Now, to playing clarinet like a saxophone . . . I can see where a trained clarinetist may be put off by someone who plays clarinet but never took a lesson. But that situation exists with many of us saxophone players. I am one. Sure, I wish I would have studied clarinet but I'm far beyond that now.
How DOES one play a clarinet like a saxophone? Are you talking embouchure, horn position, attitude, what? If Bechet and Bob Helm are examples of that, they are great ones. I agree with the volume and power attributes mentioned by Pat . . . those guys had it. I doubt if they'd fit in well with the L.A. Philharmonic, though. DAVE