Marcinkiewicz CH BSC FL vs Schilke 20F
The Schilke 20F has a wider cup diameter, the Schilke 20F features a deeper cup, the Marcinkiewicz CH BSC FL has a larger throat opening.
Cup Diameter
The Schilke 20F has a cup diameter of 17.78 mm / 0.7000 in compared to 16.74 mm / 0.6591 in on the Marcinkiewicz CH BSC FL — a difference of 1.04 mm / 0.0409 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Schilke 20F has a medium cup while the Marcinkiewicz CH BSC FL has a very shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Marcinkiewicz CH BSC FL has a wider throat (4.39 mm / 0.1728 in vs 3.86 mm / 0.1520 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.