Bach 7EW vs Stork CM3
The Stork CM3 has a wider cup diameter, the Stork CM3 features a deeper cup.
Cup Diameter
The Stork CM3 has a cup diameter of 16.30 mm compared to 16.20 mm on the Bach 7EW — a difference of +0.10 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Stork CM3 has a medium cup while the Bach 7EW has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm, so resistance feel will be comparable.
Finish
The Bach 7EW is listed as unspecified, and the Stork CM3 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.