It all can be very confusing, for sure, and I have limited experience, but I can comment on a few things by basically quoting TGM.
Angular momentum can be explained this way. American football kickers in the old days used to kick "straight on" and could only kick about 30 yards or so. But when soccer kickers came on the scene, with their angled line of approach, and 'roundhoused' the ball, distances doubled. So, Angular Momentum is an aspect of every golf swing by virtue of the clubs approach to the ball.
With regard to a power advantage between Axe or Rope, I'm pretty sure
Full Power can be achieved with either procedure.
Thats about as much as I would be comfortable commenting on. lol I'll let the experts comment on the other stuff.
