The P1D is longer and thicker. Has anyone who has owned both found the size difference noticeable for key chain application? Is the P1D too big for that?
The diameter on the P1 bugs me too much for daily carry, the P1D is even larger. But it depends on how many questions you can take on the bulge in your pocket. BTW saying 'wanna see my light saber' is an answer that may land you in HR.