The difference besides the obvious of coming from either the right wing or left wing of the turkey is the direction they will bend easily. Some folks have said a right hand shooter should shoot left wing feathers and vice versa. I am a right hand shooter and shoot right wing feathers simply because I find right wing much easier to fletch than left wing due to how my jigs are.

Right wing feathers can only be fletched right and left wing left. They just won’t flex in the opposite direction.

I find left wing to be a PIA to deal with. When you talk about degrees of offset I think that may be for straight fletch but not completely sure. I set my jigs up to give me the absolute maximum helical I can get and still keep the feather quill in complete contact with the shaft. Too much and you won’t be able to get the feather to rest flat on the shaft.

Again many people seem to think that shield cut feathers are louder in noise than parabolic cut feathers. Personally I have never really noticed a difference at least at hunting distances. To me it is just a personal choice based on appearance. I like the looks of shield best but most of my arrows are parabolic just because I can find more and cheaper feathers in the parabolic cut.

Good luck