Bruno Tilz 305-4 MS vs Bruno Tilz 306-5 GS
The Bruno Tilz 306-5 GS has a wider cup diameter, the Bruno Tilz 306-5 GS features a deeper cup, the Bruno Tilz 306-5 GS 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
Bruno Tilz 305-4 MS
• Trombone
CatalogRim width—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Bruno Tilz 306-5 GS
• Trombone
CatalogRim width—
Best suited for
High-volume projection — open throat for power
Which is better?
Both mouthpieces are categorized as "Catalog" — the physical dimensions above will determine which suits your embouchure and playing style better.