Well it's not an Ergo Grip according to Falcon...
Any other guesses?
From a design perspective it has these significant differences from the Ergo Grip:
1) More vertical grip angle is more comfortable.
2) The whole grip sits 1/4" further back from the rear of the trigger guard. This provides greater relief for the middle finger, a higher grip and a longer trigger reach. I have big hands (10" spread) and although this grip appears much smaller than the Ergo Grip, this one fits my hands perfectly and the placement helps me with proper trigger finger placement.
It feels just like the grip on my HK94 clone -- perfect!
The only problem is that on my old PWA lower the area where the grip meets the back of the trigger guard is ~ 1/16" too high so the sharp corners contact my finger. The Gapper doesn't quite solve this problem.
I guess it has one other problem -- availability!