Denis Wick 2.5CC vs Kelly 50-SS
The Kelly 50-SS has a wider cup diameter, the Kelly 50-SS features a deeper cup.
Cup Diameter
The Kelly 50-SS has a cup diameter of 33.27 mm / 1.3098 in compared to 32.00 mm / 1.2598 in on the Denis Wick 2.5CC — a difference of 1.27 mm / 0.0500 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Kelly 50-SS has a — cup while the Denis Wick 2.5CC has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Material
The Denis Wick 2.5CC is described as unspecified, and the Kelly 50-SS as 316 Surgical Stainless Steel. Material affects mass, warmth, and how quickly the piece responds.
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.