Marcinkiewicz 302 vs Marcinkiewicz 306
the Marcinkiewicz 306 features a deeper cup.
Mouthpiece A
Marcinkiewicz 302
• Cornet
Cup diameter17.20 mm / 0.6772 in
Cup depthVery shallow
Rim width—
Throat diameter3.73 mm / 0.1469 in
Backbore—
Finish—
Material—
vs
Mouthpiece B
Marcinkiewicz 306
• Cornet
Cup diameter17.20 mm / 0.6772 in
Cup depthShallow
Rim width—
Throat diameter3.73 mm / 0.1469 in
Backbore—
Finish—
Material—
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 17.20 mm / 0.6772 in.
Cup Depth
The Marcinkiewicz 306 has a shallow cup while the Marcinkiewicz 302 has a very shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
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.