Bruno Tilz 213- S 2 vs Bruno Tilz 304- A 1
The Bruno Tilz 213- S 2 has a wider cup diameter, the Bruno Tilz 213- S 2 features a deeper cup, the Bruno Tilz 213- S 2 has a larger throat opening.
Cup Diameter
The Bruno Tilz 213- S 2 has a cup diameter of 23.00 mm / 0.9055 in compared to 22.00 mm / 0.8661 in on the Bruno Tilz 304- A 1 — a difference of 1.00 mm / 0.0394 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bruno Tilz 213- S 2 has a medium cup while the Bruno Tilz 304- A 1 has a very shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Bruno Tilz 213- S 2 has a wider throat (4.60 mm / 0.1811 in vs 4.40 mm / 0.1732 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
Which is better?
Both mouthpieces are categorized as "Catalog" — the physical dimensions above will determine which suits your embouchure and playing style better.