Bruno Tilz 211-513 M vs Marcinkiewicz 11
The Marcinkiewicz 11 has a wider cup diameter, the Marcinkiewicz 11 has a larger throat opening.
Cup Diameter
The Marcinkiewicz 11 has a cup diameter of 17.58 mm / 0.6921 in compared to 17.00 mm / 0.6693 in on the Bruno Tilz 211-513 M — a difference of 0.58 mm / 0.0228 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Marcinkiewicz 11 has a wider throat (4.85 mm / 0.1909 in vs 4.80 mm / 0.1890 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.