Bach 10½D vs Bach 10½DW
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Bach 10½D
• Cornet
Cup diameter15.90 mm / 0.6260 in
Cup depthShallow
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore—
Finish—
Material—
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Bach 10½DW
• Cornet
Cup diameter15.90 mm / 0.6260 in
Cup depthShallow
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore—
Finish—
Material—
Best suited for
Lead / commercial — shallow cup for brightness and range
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 15.90 mm / 0.6260 in.
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.
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.