Bruno Tilz 211-D 7 vs Bruno Tilz 211-SB 4 T
The Bruno Tilz 211-D 7 has a wider cup diameter, the Bruno Tilz 211-SB 4 T features a deeper cup, the Bruno Tilz 211-D 7 has a larger throat opening.
Cup Diameter
The Bruno Tilz 211-D 7 has a cup diameter of 19.00 mm / 0.7480 in compared to 17.00 mm / 0.6693 in on the Bruno Tilz 211-SB 4 T — a difference of 2.00 mm / 0.0787 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bruno Tilz 211-SB 4 T has a medium cup while the Bruno Tilz 211-D 7 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-D 7 has a wider throat (4.30 mm / 0.1693 in vs 4.00 mm / 0.1575 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.