Curry 4C vs Schilke 57
The Schilke 57 has a wider cup diameter, the Schilke 57 has a larger throat opening.
Cup Diameter
The Schilke 57 has a cup diameter of 26.52 mm / 1.0441 in compared to 25.73 mm / 1.0130 in on the Curry 4C — a difference of 0.79 mm / 0.0311 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 Schilke 57 has a wider throat (5.95 mm / 0.2343 in vs 5.92 mm / 0.2330 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.