Monette Cornet AP1-1 S13 vs Monette Cornet D4D S3
The Monette Cornet AP1-1 S13 has a wider cup diameter, the Monette Cornet AP1-1 S13 features a deeper cup.
Cup Diameter
The Monette Cornet AP1-1 S13 has a cup diameter of 17.00 mm compared to 16.20 mm on the Monette Cornet D4D S3 — a difference of +0.80 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Monette Cornet AP1-1 S13 has a very deep cup while the Monette Cornet D4D S3 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm, so resistance feel will be comparable.
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.