Marcinkiewicz 6C (Standard) vs Marcinkiewicz 7CW (Standard)
The Marcinkiewicz 7CW (Standard) has a wider cup diameter.
Mouthpiece A
Marcinkiewicz 6C (Standard)
• Cornet
Cup diameter16.87 mm / 0.6642 in
Cup depthDeep
Rim width—
Throat diameter3.73 mm / 0.1469 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Marcinkiewicz 7CW (Standard)
• Cornet
Cup diameter16.97 mm / 0.6681 in
Cup depthDeep
Rim width—
Throat diameter3.73 mm / 0.1469 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Diameter
The Marcinkiewicz 7CW (Standard) has a cup diameter of 16.97 mm / 0.6681 in compared to 16.87 mm / 0.6642 in on the Marcinkiewicz 6C (Standard) — a difference of 0.10 mm / 0.0039 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 3.73 mm / 0.1469 in, so resistance feel will be comparable.
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.