Schilke M150* vs Yamaha TR-14B4
The Schilke M150* has a wider cup diameter, the Schilke M150* features a deeper cup, the Schilke M150* has a larger throat opening.
Cup Diameter
The Schilke M150* has a cup diameter of 17.52 mm / 0.6898 in compared to 16.85 mm / 0.6634 in on the Yamaha TR-14B4 — a difference of 0.67 mm / 0.0264 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Schilke M150* has a medium cup while the Yamaha TR-14B4 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Schilke M150* has a wider throat (3.86 mm / 0.1520 in vs 3.65 mm / 0.1437 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.