Bob Reeves 40/SV/692sL vs Warburton 5SV
The Warburton 5SV has a wider cup diameter, the Bob Reeves 40/SV/692sL features a deeper cup.
Cup Diameter
The Warburton 5SV has a cup diameter of 16.20 mm compared to 15.88 mm on the Bob Reeves 40/SV/692sL — a difference of +0.32 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bob Reeves 40/SV/692sL has a shallow cup while the Warburton 5SV has a very shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Finish
The Bob Reeves 40/SV/692sL is listed as unspecified, and the Warburton 5SV as Silver plate. Finish mainly changes lip feel, tarnish resistance, and appearance rather than cup geometry.
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.