how big are the differences in the real mccoy version of the deck jacket and an actual USN deck jkt? i own a pair of WWII deck pants and really love them. i wish they were a little more slim fitting though, not slim fit, but straight fit with a little tapering towards the bottom. but i cant really complain, i use them more for function on those cold winter days. i'm guessing that the real mccoy is more form fitting?