I am not familiar with either model of the CDP, however, I was able to find info. on one of the 1911 forums, hope it answers your question.
The Kimber Series-I ignition systems are identical to the highly sought after Colt Series 70's, Ed Browns, Springfield Armory, Les Baers, Wilsons, STI's...you get the point. The Kimber Series-II can most closely be compared to the newly recalled S&W 1911's FPS (firing pin safety).
So, basically, I guess he CDP has no firing pin safety, but the CDP II does. As far as the Ultra CDP II is concerned, its a .45 made by Kimber... how bad of a self defense piece could it be?
Swoop