The ProComp kit consists of spacers that mount between the macpherson strut assembly and the strut tower, spacing the entire front suspension down, and springs & shocks for the rear, the Ironman kit, as far as I can tell, has springs for both front & rear, along with struts for the front & shocks for the rear.
In theory, the ironman kit would be the better of the two, assuming that the struts & shocks allow for longer travel, and are properly matched to the springs.
Two things to be aware of - first - the rear bushing of the front control arm has been known to fail prematurely on stock height vehicles that see off road use, lifting the vehicle is likely to further aggravate this - it is, in my opinion, a design flaw (the suspension is better suited to a FWD sedan than an AWD crossover SUV), and lifting the rear does not lift the rear arms which are prone to dragging in the dirt.
Sorry - I can't help with tire sizes.