Bruno Tilz 211-T 5 vs Kelly 11
The Kelly 11 has a wider cup diameter, the Kelly 11 features a deeper cup, the Bruno Tilz 211-T 5 has a larger throat opening.
Cup Diameter
The Kelly 11 has a cup diameter of 18.29 mm / 0.7201 in compared to 18.00 mm / 0.7087 in on the Bruno Tilz 211-T 5 — a difference of 0.29 mm / 0.0114 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Kelly 11 has a — cup while the Bruno Tilz 211-T 5 has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bruno Tilz 211-T 5 has a wider throat (4.20 mm / 0.1654 in vs 3.66 mm / 0.1441 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Material
The Bruno Tilz 211-T 5 is described as unspecified, and the Kelly 11 as Lexan polycarbonate. Material affects mass, warmth, and how quickly the piece responds.
Which is better?
The Bruno Tilz 211-T 5 is designed for catalog playing, while the Kelly 11 targets general use. Your best choice depends on your musical context.