Curry 7 TF vs Marcinkiewicz E15J. Rinaldo
The Curry 7 TF has a wider cup diameter, the Marcinkiewicz E15J. Rinaldo has a larger throat opening.
Cup Diameter
The Curry 7 TF has a cup diameter of 16.56 mm / 0.6520 in compared to 16.51 mm / 0.6500 in on the Marcinkiewicz E15J. Rinaldo — a difference of 0.05 mm / 0.0020 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 E15J. Rinaldo has a wider throat (3.73 mm / 0.1469 in vs 3.70 mm / 0.1455 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.