Mine is the R/T Classic. It comes with the special wheels, stripes and old style Challenger script. If you look at the build and price menus they usually have a small description of what you get. The R/T is the base Hemi with few options. The R/T plus comes with a lot of options and the Classic comes with most. Things like keyless entry, temp control, U-Connect, Self dimming rear view mirror with compass and fancy radio. If you like your Garmin, don't bother with the in car nav. It's less intuitive than my old garmin, and you can't access it while the car is in motion.
The Super Track Pack for automatic has better brake pads, shocks, and stability control off button (burnouts!) I went around and around about gear ratios with the salesmen. Apparently the "good" gear ratio is reserved for manuals. It will physically bolt in to the auto cars, but ruins the fuel mileage rating so no go from the factory. The leather seats (standard R/T ones anyway) are all leather and heated.
A lot of these options are only available in packages, not individually so you have to decide do you want a stripped down model, or luxury sport.