It's like it is in a plane, with just different maneuvers and knowledge areas. All my helo checkrides have been military and many have been really difficult. In the civilian world they follow the PTS like in airplanes. (ATM, or Aircrew Training Manual for us). Many things are sort of the same (straight and level, turns, climbs descents, x-cntry nav)- some things are completely different (slope landings, hovering, slingloads, autos). Not sure of it's the same in the civilian world, but we always got hammered on systems pretty heavily.