Curry 6 B vs Marcinkiewicz CH 10
The Marcinkiewicz CH 10 has a wider cup diameter, the Curry 6 B has a larger throat opening.
Cup Diameter
The Marcinkiewicz CH 10 has a cup diameter of 16.84 mm / 0.6630 in compared to 16.71 mm / 0.6580 in on the Curry 6 B — a difference of 0.13 mm / 0.0050 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Curry 6 B has a wider throat (3.70 mm / 0.1455 in vs 3.66 mm / 0.1441 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.