Bruno Tilz 211-D 7 vs Yamaha HR-28B
The Bruno Tilz 211-D 7 has a wider cup diameter, the Bruno Tilz 211-D 7 has a larger throat opening.
Cup Diameter
The Bruno Tilz 211-D 7 has a cup diameter of 19.00 mm / 0.7480 in compared to 16.87 mm / 0.6642 in on the Yamaha HR-28B — a difference of 2.13 mm / 0.0839 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Bruno Tilz 211-D 7 has a wider throat (4.30 mm / 0.1693 in vs 3.90 mm / 0.1535 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.