Bach 1¼G vs Schilke 59
The Schilke 59 has a wider cup diameter, the Bach 1¼G features a deeper cup, the Schilke 59 has a larger throat opening.
Cup Diameter
The Schilke 59 has a cup diameter of 28.52 mm / 1.1228 in compared to 27.50 mm / 1.0827 in on the Bach 1¼G — a difference of 1.02 mm / 0.0402 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 1¼G has a very deep cup while the Schilke 59 has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Schilke 59 has a wider throat (7.54 mm / 0.2969 in vs 7.01 mm / 0.2760 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.