Bach Mega Tone Cornet 5B vs Monette Cornet B2 FL
The Monette Cornet B2 FL has a wider cup diameter, the Bach Mega Tone Cornet 5B has a larger throat opening.
Cup Diameter
The Monette Cornet B2 FL has a cup diameter of 17.00 mm / 0.6693 in compared to 16.25 mm / 0.6398 in on the Bach Mega Tone Cornet 5B — a difference of 0.75 mm / 0.0295 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Bach Mega Tone Cornet 5B has a wider throat (3.73 mm / 0.1469 in vs 3.66 mm / 0.1441 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.