Bach 14½D vs Bruno Tilz 213- T 2 1/2
The Bach 14½D has a wider cup diameter, the Bruno Tilz 213- T 2 1/2 features a deeper cup, the Bach 14½D has a larger throat opening.
Cup Diameter
The Bach 14½D has a cup diameter of 24.50 mm / 0.9646 in compared to 23.50 mm / 0.9252 in on the Bruno Tilz 213- T 2 1/2 — a difference of 1.00 mm / 0.0394 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bruno Tilz 213- T 2 1/2 has a deep cup while the Bach 14½D has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 14½D has a wider throat (5.85 mm / 0.2303 in vs 4.60 mm / 0.1811 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.