Bach 1B vs Monette Cornet B7F FL
The Bach 1B has a wider cup diameter, the Bach 1B features a deeper cup.
Cup Diameter
The Bach 1B has a cup diameter of 17.00 mm / 0.6693 in compared to 15.90 mm / 0.6260 in on the Monette Cornet B7F FL — a difference of 1.10 mm / 0.0433 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 1B has a deep cup while the Monette Cornet B7F FL 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 / 0.1441 in, 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.