Bach 8½A vs Marcinkiewicz 1 / 5B
The Marcinkiewicz 1 / 5B has a wider cup diameter, the Bach 8½A features a deeper cup, the Marcinkiewicz 1 / 5B has a larger throat opening.
The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.
Mouthpiece A
Bach 8½A
• Cornet
Rim width—
vs
Mouthpiece B
Marcinkiewicz 1 / 5B
• Cornet
Rim width—
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.