I'm trying to help a friend who is thinking about a 2014 R/T Classic. I have an '13 R/T+. The R/T Classic option 28M is $4000. The R/T+ option 28J is $2000. What do you get for the extra $2000? All I can find is Func. Hood Scoops, High In. Headlamps, Challenger Scripts on Fenders, Body Stripes, Prem. Seats. Are there other items? Is this worth the extra $2000? Are the Prem Seats that much different? Thanks for the help.