I understand that the R/T Plus has the Super Track Pak, and a high performance Bilstein suspension, but what does that actually include? Different shocks and springs? I know the STP gives extra pages and apps on the UConnect screen. How different is the feel in handling between the two of these? Regardless of which one I buy, I'm doing mods like lowering springs, front and rear strut tower braces, anti-wheel-hop kit, much wider tires, upgraded rear suspension, and subframe connectors.