Bruno Tilz 310-M 0 vs Bruno Tilz 310-M 28
The Bruno Tilz 310-M 0 has a wider cup diameter.
Mouthpiece A
Bruno Tilz 310-M 0
• Tuba
CatalogCup diameter33.70 mm / 1.3268 in
Cup depthDeep
Rim width—
Throat diameter8.30 mm / 0.3268 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Bruno Tilz 310-M 28
• Tuba
CatalogCup diameter33.50 mm / 1.3189 in
Cup depthDeep
Rim width—
Throat diameter8.30 mm / 0.3268 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
The Bruno Tilz 310-M 0 has a cup diameter of 33.70 mm / 1.3268 in compared to 33.50 mm / 1.3189 in on the Bruno Tilz 310-M 28 — a difference of 0.20 mm / 0.0079 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 8.30 mm / 0.3268 in, so resistance feel will be comparable.
Which is better?
Both mouthpieces are categorized as "Catalog" — the physical dimensions above will determine which suits your embouchure and playing style better.