Giardinelli 18 vs Yamaha BB-BOBO-SYM-S
The Yamaha BB-BOBO-SYM-S has a wider cup diameter, the Giardinelli 18 features a deeper cup, the Giardinelli 18 has a larger throat opening.
Cup Diameter
The Yamaha BB-BOBO-SYM-S has a cup diameter of 32.90 mm compared to 31.00 mm on the Giardinelli 18 — a difference of +1.90 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Giardinelli 18 has a deep cup while the Yamaha BB-BOBO-SYM-S has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Giardinelli 18 has a wider throat (7.95 mm vs 7.50 mm). 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.