Been there, done them both - Military and Civilian SAR.
I was once asked at RAF Fairford when I was doing the commentating for a Civilian SAR demo "If I was in the water and I saw a rescue helicopter coming for me. Which would I prefer? Military or Civilian SAR" to which I replied "Does it matter?"
As long as the equipment is good and the guys are well trained and experienced, does it matter?
I hear the AB139 has a few problems SAR wise? Don't know if this is true though