Bach Mega Tone Flugel 1½C vs Denis Wick SFL
The Bach Mega Tone Flugel 1½C has a wider cup diameter, the Denis Wick SFL has a larger throat opening.
Cup Diameter
The Bach Mega Tone Flugel 1½C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.00 mm / 0.6299 in on the Denis Wick SFL — a difference of 1.00 mm / 0.0394 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 Denis Wick SFL has a wider throat (4.45 mm / 0.1752 in vs 4.04 mm / 0.1591 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.