Bach 1½C vs Denis Wick 1
The Denis Wick 1 has a wider cup diameter, the Denis Wick 1 features a deeper cup, the Denis Wick 1 has a larger throat opening.
Cup Diameter
The Denis Wick 1 has a cup diameter of 17.25 mm / 0.6791 in compared to 17.00 mm / 0.6693 in on the Bach 1½C — a difference of 0.25 mm / 0.0098 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick 1 has a very deep cup while the Bach 1½C has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Denis Wick 1 has a wider throat (3.89 mm / 0.1531 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.