Kelly 3C vs Yamaha CR-DUTOT-S
The Kelly 3C has a wider cup diameter, the Kelly 3C has a larger throat opening.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Kelly 3C
• Cornet
GeneralCup depthVery deep
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
All-purpose mid-range
vs
Mouthpiece B
Yamaha CR-DUTOT-S
• Cornet
Cup depthVery deep
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Depth
Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.
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.