Stork CM3 vs Warburton 5M
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 / 0.6417 in compared to 16.20 mm / 0.6378 in on the Warburton 5M — a difference of 0.10 mm / 0.0039 in. 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 Warburton 5M 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 / 0.1441 in, so resistance feel will be comparable.
Finish
Both the Stork CM3 and Warburton 5M are listed with the same finish (Silver plate).
Which is better?
The Stork CM3 is designed for classical playing, while the Warburton 5M targets versatile use. Your best choice depends on your musical context.