Denis Wick 2.5CC vs Kelly 25
The Denis Wick 2.5CC has a wider cup diameter, the Denis Wick 2.5CC features a deeper cup.
Cup Diameter
The Denis Wick 2.5CC has a cup diameter of 32.00 mm / 1.2598 in compared to 30.99 mm / 1.2201 in on the Kelly 25 — a difference of 1.01 mm / 0.0398 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Denis Wick 2.5CC has a deep cup while the Kelly 25 has a medium 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 25 as Lexan polycarbonate. 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.