Bruno Tilz 214-4 MSG vs Marcinkiewicz 8
The Bruno Tilz 214-4 MSG has a wider cup diameter, the Marcinkiewicz 8 has a larger throat opening.
Cup Diameter
The Bruno Tilz 214-4 MSG has a cup diameter of 26.00 mm / 1.0236 in compared to 25.93 mm / 1.0209 in on the Marcinkiewicz 8 — a difference of 0.07 mm / 0.0028 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Marcinkiewicz 8 has a wider throat (6.63 mm / 0.2610 in vs 6.50 mm / 0.2559 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.