Keith, 

The Vokey Design 200 Series features a classic head shape with a high toe peak and a soft trailing edge with a Tour-inspired teardrop shape.  The SM4, at address, will have a slightly larger teardrop profile and CAD generated progressive leading edge, toe profile and topline radius through the range of lofts.

The 200 Series grooves will offer medium spin through Condition-of-Competition (C-C) conforming grooves and a slightly higher trajevctory then the SM4.  The SM4 will offer maximum conforming spin through tour extreme grooves that feature 100% inspected, tight tolerance, aggressive groove edges at the limits allowed by the Rules of Golf.  

Both will offer maximum partial shot and control from the milled micro edge face texture that provides grip on less than full shots.  The SM4 will offer a more durable groove from a localized heat treatment in the impact area that preserves the precise milled grooves and micro edges.

Cameron 

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