Curry 3 BBC. vs Curry 1.25 DC
The Curry 1.25 DC has a wider cup diameter, the Curry 3 BBC. has a larger throat opening.
Cup Diameter
The Curry 1.25 DC has a cup diameter of 17.07 mm / 0.6720 in compared to 16.89 mm / 0.6650 in on the Curry 3 BBC. — a difference of 0.18 mm / 0.0070 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Curry 3 BBC. has a wider throat (4.06 mm / 0.1600 in vs 3.81 mm / 0.1500 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.