MS Cups
The MS Cup has a slightly lower alpha angle, greater cup volume, a slight increase in cup depth, as well as, a larger backbore ( #2 Backbore) than the S Cup. This is a great all around cup with a huge brilliant sound.
The Paul Butcher 65.6MS features the #1 Backbore.
The added volume and a slightly lower alpha angle than the S Cup gives the player more lip room. An ideal solution for players who find that the GR S cup is a bit tight for them.
The sound is big and full with an excellent core.
It has less edge than the S Cup and works well in all playing situations.