This interesting bit of news about hood striping and wheel options was posted on allpar by an "insider":

"...SRT rim style will be exclusive to the SRT, as they have been with other models. The R/T will come standard with 18" aluminum wheels, while chrome clad 20" wheels will be an option/package. No white-letter tires on any of the Challenger models btw. I believe hood stripes will be SRT only, but this is a feature that is easy to change at any time so it's hard to make a prediction as to what they will do. I'm sure that they have some sort of plans in place for a variety of different cosmetic "treatments" for the different models, whether at launch or throughout the model year.

Something else that should be noted per the recent spy pics of the Challenger, especially anyone basing their "final" decision/opinion on what they like and don't like - the photos are of pre-production vehicles and come reveal/production time there could certainly be some minor changes."