Denis Wick 2.5CC vs Marcinkiewicz ETU1J. Self
The Marcinkiewicz ETU1J. Self has a wider cup diameter, the Denis Wick 2.5CC features a deeper cup, the Denis Wick 2.5CC has a larger throat opening.
Cup Diameter
The Marcinkiewicz ETU1J. Self has a cup diameter of 33.15 mm / 1.3051 in compared to 32.00 mm / 1.2598 in on the Denis Wick 2.5CC — a difference of 1.15 mm / 0.0453 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick 2.5CC has a deep cup while the Marcinkiewicz ETU1J. Self has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Denis Wick 2.5CC has a wider throat (8.60 mm / 0.3386 in vs 8.03 mm / 0.3161 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.