This is my first post here.
I own a mouthpiece cafe espresso and a mouthpiece cafe slant supreme. I think all the slant supremes now have the Bergonzi signature on them. To me they are very close in terms of darkness. The espresso was a little more focused yet very full without a lot of high-end punch in the sound yet the high notes remained dark and reedy. The slant felt more spread, although still very dark, with a bit more of what I perceive as a traditional jazz tenor sound.
I don’t use either of them at the moment, but I haven’t gotten rid of them for a reason.
I wouldn’t hesitate to trust the quality and craftsmenshup of these mouthpieces, and I hope to try more of their offerings in the future.