Earl, in my mind it all boils down to memory! Your memory, to disengage the safety!
That's why the majority of people, should use a Double Action/Single Action, Double Action Only, or Striker Fired type of pistol for self defense. With the DA/SA design, no levers or grip safety to move or grasp, for the pistol to be able to fire that first round! Just a long and deliberate trigger pull! After the first round, trigger action will be no different between the two, for all practical purposes.
I would choose the P239 over the 1911 Ultra Compact.