Bruno Tilz 300-1/2 E vs Yamaha TR-14B4
The Bruno Tilz 300-1/2 E has a wider cup diameter, the Bruno Tilz 300-1/2 E features a deeper cup, the Bruno Tilz 300-1/2 E has a larger throat opening.
Cup Diameter
The Bruno Tilz 300-1/2 E has a cup diameter of 17.00 mm / 0.6693 in compared to 16.85 mm / 0.6634 in on the Yamaha TR-14B4 — a difference of 0.15 mm / 0.0059 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bruno Tilz 300-1/2 E has a deep 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 Bruno Tilz 300-1/2 E has a wider throat (3.70 mm / 0.1457 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.