Bach 1¼C vs Warburton 2M
The Bach 1¼C has a wider cup diameter, the Warburton 2M features a deeper cup, the Warburton 2M has a larger throat opening.
Cup Diameter
The Bach 1¼C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.78 mm / 0.6606 in on the Warburton 2M — a difference of 0.22 mm / 0.0087 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Warburton 2M has a deep cup while the Bach 1¼C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Warburton 2M has a wider throat (3.70 mm / 0.1457 in vs 3.66 mm / 0.1441 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Finish
The Bach 1¼C is listed as unspecified, and the Warburton 2M as Silver plate. Finish mainly changes lip feel, tarnish resistance, and appearance rather than cup geometry.
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.