Marcinkiewicz 6 / 10.5C vs Schilke 13D4
The Schilke 13D4 has a wider cup diameter.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Marcinkiewicz 6 / 10.5C
• Trumpet
Cup diameter16.84 mm / 0.6630 in
vs
Mouthpiece B
Schilke 13D4
• Trumpet
Cup diameter16.89 mm / 0.6650 in
Cup Diameter
The Schilke 13D4 has a cup diameter of 16.89 mm / 0.6650 in compared to 16.84 mm / 0.6630 in on the Marcinkiewicz 6 / 10.5C — a difference of 0.05 mm / 0.0020 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.