Bruno Tilz 310-M 41 vs Bruno Tilz 310-M 42
the Bruno Tilz 310-M 42 has a larger throat opening.
Mouthpiece A
Bruno Tilz 310-M 41
• Tuba
CatalogCup diameter33.00 mm / 1.2992 in
Cup depth
Rim width—
Throat diameter8.20 mm / 0.3228 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bruno Tilz 310-M 42
• Tuba
CatalogCup diameter33.00 mm / 1.2992 in
Cup depth
Rim width—
Throat diameter8.90 mm / 0.3504 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 33.00 mm / 1.2992 in.
Throat Diameter
The Bruno Tilz 310-M 42 has a wider throat (8.90 mm / 0.3504 in vs 8.20 mm / 0.3228 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Which is better?
Both mouthpieces are categorized as "Catalog" — the physical dimensions above will determine which suits your embouchure and playing style better.