Marcinkiewicz CH 7 vs Yamaha TR-14D4
The Marcinkiewicz CH 7 has a wider cup diameter, the Marcinkiewicz CH 7 has a larger throat opening.
Cup Diameter
The Marcinkiewicz CH 7 has a cup diameter of 16.84 mm / 0.6630 in compared to 16.80 mm / 0.6614 in on the Yamaha TR-14D4 — a difference of 0.04 mm / 0.0016 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Marcinkiewicz CH 7 has a wider throat (3.66 mm / 0.1441 in vs 3.65 mm / 0.1437 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.