Bruno Tilz 211-B 4 vs Bruno Tilz 211-DS 6
The Bruno Tilz 211-DS 6 has a wider cup diameter, the Bruno Tilz 211-B 4 features a deeper cup, the Bruno Tilz 211-DS 6 has a larger throat opening.
Cup Diameter
The Bruno Tilz 211-DS 6 has a cup diameter of 18.50 mm compared to 17.50 mm on the Bruno Tilz 211-B 4 — a difference of +1.00 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bruno Tilz 211-B 4 has a medium cup while the Bruno Tilz 211-DS 6 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bruno Tilz 211-DS 6 has a wider throat (4.30 mm vs 4.00 mm). 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.