The PF9 has a better trigger, better sights, weighs less, and is easier to conceal. The trigger on the P-11 is heavy, but it does hold more ammo... I like the PF9. I bought one and after 400 rounds of 115 grn FMJ and a couple hundred rounds of 147 grn JHP its still ticking and feeds most everything reliably... (except for the 115 grn HP... too short.)I'm keeping it.