Marcinkiewicz 13 vs Yamaha HR-29C4
The Marcinkiewicz 13 has a wider cup diameter, the Marcinkiewicz 13 features a deeper cup, the Marcinkiewicz 13 has a larger throat opening.
Cup Diameter
The Marcinkiewicz 13 has a cup diameter of 17.42 mm compared to 17.08 mm on the Yamaha HR-29C4 — a difference of +0.34 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Marcinkiewicz 13 has a deep cup while the Yamaha HR-29C4 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Marcinkiewicz 13 has a wider throat (4.70 mm vs 3.98 mm). 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.