To answer your question about how it differs from the Keeper, it differs in several major ways. First the original wedge on the Keeper that cams the pistol into the body has been slimmed down to the absolute minimum that is needed, which is the "wave". Additionally, it was built specifically to interface with the DCC clips. With over a year of development on the holster we have come to love the DCC clips as they provide a very robust mounting solution that is also very slim. Add these two things together and you achieve a very slim holster that is easier to conceal along with making it more comfortable for the user ( no mater what we all say, if you can reduce the foot print it will make the holster more comfortable). Lastly, we have built these holster with a mind to be able to survive a harsh environment just like the original Keeper, and with the extended testing we started in Jan we have been very happy with how they have held up.