Monette B4S S2 vs Monette original BP1-1
The Monette original BP1-1 has a wider cup diameter, the Monette original BP1-1 features a deeper cup.
Cup Diameter
The Monette original BP1-1 has a cup diameter of 17.00 mm compared to 16.20 mm on the Monette B4S S2 — a difference of +0.80 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Monette original BP1-1 has a medium cup while the Monette B4S S2 has a shallow 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.