82210574AC - 2 door
82210575AC - 4 door
As for the difference in rails, the enhanced rails come with an extra tub welded on them for extra protection as well as offering a quasi step. They are also a bit heavier than the standard Rubi rails.
2013 JKU Sahara, Gecko Green, loaded up
Spidertrax spacers, Teraflex levling kit, 275/70/18 Duratracs, AEV front/rear bumpers and hood