Yamaha FH-14F4 vs Yamaha FH-SHEW
The Yamaha FH-14F4 has a wider cup diameter, the Yamaha FH-SHEW has a larger throat opening.
Cup Diameter
The Yamaha FH-14F4 has a cup diameter of 16.76 mm / 0.6598 in compared to 16.54 mm / 0.6512 in on the Yamaha FH-SHEW — a difference of 0.22 mm / 0.0087 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 Yamaha FH-SHEW has a wider throat (4.40 mm / 0.1732 in vs 4.30 mm / 0.1693 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.