Bach 25 vs Bruno Tilz 231-T 5
The Bruno Tilz 231-T 5 has a wider cup diameter, the Bruno Tilz 231-T 5 features a deeper cup, the Bach 25 has a larger throat opening.
Cup Diameter
The Bruno Tilz 231-T 5 has a cup diameter of 35.00 mm compared to 30.60 mm on the Bach 25 — a difference of +4.40 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bruno Tilz 231-T 5 has a deep cup while the Bach 25 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bach 25 has a wider throat (8.33 mm vs 7.80 mm). 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.