Bach 24W vs Marcinkiewicz 25
The Bach 24W has a wider cup diameter, the Bach 24W features a deeper cup, the Bach 24W has a larger throat opening.
Cup Diameter
The Bach 24W has a cup diameter of 31.25 mm / 1.2303 in compared to 31.24 mm / 1.2299 in on the Marcinkiewicz 25 — a difference of 0.01 mm / 0.0004 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 24W has a medium cup while the Marcinkiewicz 25 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 24W has a wider throat (9.00 mm / 0.3543 in vs 8.33 mm / 0.3280 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.