leather is to vinyl, what diamonds are to cubic zirconias, or what mink is to synthetic... leather is the real thing, vinyl is fake leather

leather is the real deal, much more durable & better wearing... most less expensive leather seats are vinyl on the sides & non wear areas, deluxe are leather all around

katzkin is definatley at the top of this game, & there are a ton of options to custom design your interior... I did a 2 tone with perferated inserts & a gm licenced logo embroadery in my car from katzkin, which they actually charge an aditional royalty fee to do this for gm licencing for the embroidery

a search for leather kits should give a bunch of alternatives, but in the end you get what you pay for... vinyl is fake leather