Bach 18 vs Denis Wick 4N
The Denis Wick 4N has a wider cup diameter, the Denis Wick 4N features a deeper cup, the Denis Wick 4N has a larger throat opening.
Cup Diameter
The Denis Wick 4N has a cup diameter of 18.00 mm / 0.7087 in compared to 16.15 mm / 0.6358 in on the Bach 18 — a difference of 1.85 mm / 0.0728 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick 4N has a very deep cup while the Bach 18 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 4N has a wider throat (4.70 mm / 0.1850 in vs 4.50 mm / 0.1772 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.