360J with a few mods:
With VZ grips and the hammer polished:
The VZ boot grips with Tactical Diamonds are too aggressive for my hands, the 320 texture is too mild. The Twister version (pictured) is just dandy. Good grip, no abrasion, carries concealed well regardless of clothing material.
With the larger VZ wrap around grips I like the 320 texture and the larger grip gives me much more control with the mild texture.
Have yet to try his Operator II texture.
Regarding felt recoil I find the UM grips and these VZ grips very similar. I don't think the UM really do much in terms of recoil mitigation - they're a rather hard rubber. The VZ grip is slightly thicker side to side and this fills my hand a bit better than the UM. I find hand fitment has more effect on recoil mitigation than does grip construction material.