Kelly SCREAMER-UK vs Monette Cornet E1-5M S12
The Monette Cornet E1-5M S12 has a wider cup diameter, the Monette Cornet E1-5M S12 features a deeper cup, the Monette Cornet E1-5M S12 has a larger throat opening.
Cup Diameter
The Monette Cornet E1-5M S12 has a cup diameter of 17.00 mm / 0.6693 in compared to 16.00 mm / 0.6299 in on the Kelly SCREAMER-UK — a difference of 1.00 mm / 0.0394 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Monette Cornet E1-5M S12 has a very deep cup while the Kelly SCREAMER-UK has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Monette Cornet E1-5M S12 has a wider throat (3.66 mm / 0.1441 in vs 3.56 mm / 0.1402 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Material
The Kelly SCREAMER-UK is described as Lexan polycarbonate, and the Monette Cornet E1-5M S12 as unspecified. Material affects mass, warmth, and how quickly the piece responds.
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.