Bach 11 vs Bruno Tilz 211-D 7
The Bruno Tilz 211-D 7 has a wider cup diameter, the Bach 11 features a deeper cup, the Bach 11 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 16.55 mm / 0.6516 in on the Bach 11 — a difference of 2.45 mm / 0.0965 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 11 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 Bach 11 has a wider throat (4.50 mm / 0.1772 in vs 4.30 mm / 0.1693 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.