I glanced in my copy of Hansen's "First Man, The Life of Neil A.
Armstrong" and happened on a passage about the background of the
Apollo pilots charged with landing the LMs on the Moon: six of the
seven chosen were naval aviators
(Armstrong,Conrad,Shepard,Young,Cernan). Only one was US Air Force
(Scott). Deke Slayton hand picked the guys -- and Slayton was Air
Force.

I wonder if there are enough training or experience differences to
have played a role, or if it was an individual talent / skill issue.

Any civilian pilots ever in the US space program?