The Level II has the Torsen Lok rear diff, 4.10's and 31 spline rear axles. As far as I know there is no diff in suspension components. The FX4's also came with stainless front tow hooks, a rear tow hook (option), Alcoa rims, black interior, and the sticker. Level II's with a manual transmission also got a manual Tcase and chrome shifters (they arnt hurst shifters, just chrome)
-PlumCrazy