Went to the WedgeWorks portion of the Vokey site. I found out the info on the grinds in question, minus the "P" grind...Here is the link for you: http://www.vokey.com/tech_central/page.aspx?id=34# 

Hope this helps

Thanks! I just checked it out and here's what it says:

M Grind
The M Grind was Voke’s first and features a crescent-shaped forward bounce surface and relieved wrap surface. The sole relief reduces ground drag and provides easy-in/easy-out performance from the turf and sand regardless of the angle of attack and face angle. The relief also improves and encourages shot making by keeping the leading edge close to the ground as the head rotates from square to open, preventing the wedge from sticking when a shot is played from the open position. The toe relief allows chip shots to be played with the toe down and heel raised. Additionally, the relieved sole design provides stability on full shots by equalizing the heel and toe pressure through impact. The M Grind is a versatile design suitable for many playing styles in a variety of course conditions, and served as the inspiration for the sole designs of the Spin Milled 58-08 and 58-12.

T Grind
The T Grind is named for Titleist Brand Ambassador Tom Pernice, Jr. based on Voke’s work with Tom. Derived from the M Grind, the T Grind features a much narrower forward bounce surface with minimal camber, therefore playing with less effective bounce than M Grind wedges. With thin, flat soles and low effective bounce, T Grind wedges are suitable for players with shallow angles of attack who prefer to pick the ball cleanly, and work well in firm conditions. The T Grind served as inspiration for the sole designs of the Spin Milled 60-04 and 64-07.

E Grind
Developed by Voke with a former Titleist Brand Ambassador, the E Grind features a narrow to medium sole with full bounce surface and straight relief along the trailing edge. Slight heel camber allows the blade to be easily opened for shot-making versatility. The moderate effective bounce and full bounce surface with camber make the E Grind another versatile wedge suitable for a wide variety of playing styles and conditions. The E Grind served as inspiration for the sole designs of the Spin Milled 60-07 and 62-07.

TK Grind
The TK Grind also derives its name from Voke’s work with a former Titleist player. It features the widest sole of the special grinds with enhanced camber for a sole profile that combats digging. The width and camber of the TK sole grind reduce effective bounce without eliminating its anti-dig benefits. The medium-wide sole with enhanced front-to-back camber and heel-to-toe radius make the TK Grind a shot-maker’s wedge that is suitable in all conditions from both the sand and turf. The TK Grind served as inspiration for the sole designs of the Spin Milled 58-04 and 60-10.

TVD Grind
TVD stands for "Tour Vokey Design," although some refer to them as "Tour Van Design." The TVD Grind features a slightly narrower forward bounce surface with slightly more camber than the M. Camber allows the club face to more easily pivot around its center for versatility when opening or closing. TVD provides high performance from all turf and sand conditions.

L Grind
The L Grind was developed by Voke and a former Titleist Brand Ambassador, whose nickname inspired the grind designation. It features the narrowest forward bounce surface of all the special grinds with very little camber. This narrow crescent shaped bounce surface reduces the effective bounce making it excellent for firm conditions and for slider-sweepers.

V Grind
The V Grind is named for Bob's work with a Tour player. It features a narrower bounce surface than the M but with more bounce angle and less camber. Voke's Tour-proven heel, toe and trailing edge relief coupled with the additional bounce makes the V Grind a versatile choice for soft conditions and for driver-diggers.

Summary
By working with "the best R&D department in the world, the PGA Tour," Bob has created a range of sole grinds that enhance the shot-making and scoring ability of the best players in the world. Vokey Design wedges work in turf/sand conditions from soft to firm and with different player styles from slider/sweepers to driver/diggers. The following chart shows the primary Vokey Tour Grinds from most effective bounce to least.

Hi Matt,

Information on the 60-P grind can be found on its product page. 

http://www.vokey.com/wedges/detail.aspx?id=74

All the other grinds are included in your email above. 

For this WedgeWorks release, we have high bounce (60-P), mid bounce (60-E) and low bounce (60-T & 60-L) options. 

Best regards,

Dave N.

Vokey Marketing Manager

You can look at the glossary and see the definition of each grind and there is a chart showing the difference of each