B there is a difference between what was manufactored by Europeans for Europeans(military) and Native style. Also some minor differences but area, north to south n east to west when thinking Native. Height on the leg, how snug they fit, width of the side flap, fringes etc and then ya can consider decorations, beading, quill work, simple ribbon adornments. Also time period, in later years the style of cut often changed, when doing this crazy hobby the devil is in the details, best advice I can give is pick an area about a 10 year time frame and a socioeconomic status(hunter, farmer, townsmen etc) then begin yer reading n reaserch hahaha, I've been into this crazy hobby for 30 years or so n still find little things that I can do to improve my kit. It takes time n effort, but its all worth it in the end. hope this doesn't confuse ya to much hahaha