Denis Wick 3L vs Giardinelli Butterfield
The Denis Wick 3L has a wider cup diameter, the Denis Wick 3L has a larger throat opening.
Cup Diameter
The Denis Wick 3L has a cup diameter of 31.25 mm / 1.2303 in compared to 31.00 mm / 1.2205 in on the Giardinelli Butterfield — 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
Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Denis Wick 3L has a wider throat (8.78 mm / 0.3457 in vs 8.75 mm / 0.3445 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.