Giardinelli C10 vs Yamaha HR-28B
The Giardinelli C10 has a wider cup diameter, the Giardinelli C10 features a deeper cup, the Giardinelli C10 has a larger throat opening.
Cup Diameter
The Giardinelli C10 has a cup diameter of 17.50 mm / 0.6890 in compared to 16.87 mm / 0.6642 in on the Yamaha HR-28B — a difference of 0.63 mm / 0.0248 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Giardinelli C10 has a very deep cup while the Yamaha HR-28B has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Giardinelli C10 has a wider throat (4.90 mm / 0.1929 in vs 3.90 mm / 0.1535 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.