Warburton 3M vs Warburton 5SV
The Warburton 3M has a wider cup diameter, the Warburton 3M features a deeper cup.
Cup Diameter
The Warburton 3M has a cup diameter of 16.50 mm / 0.6496 in compared to 16.20 mm / 0.6378 in on the Warburton 5SV — a difference of 0.30 mm / 0.0118 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Warburton 3M has a medium 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.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.
Finish
Both the Warburton 3M and Warburton 5SV are listed with the same finish (Silver plate).
Which is better?
The Warburton 3M is designed for all-round playing, while the Warburton 5SV targets lead use. Your best choice depends on your musical context.