Some get triggered when you say "narrow" body. But the only reason others say "narrow" is because there is a wide body being sold. If it makes you feel better, call it a "regular" or "original" or even "standard" bodied Challenger. There's better things to get upset about honestly.
Aside from what was mentioned about suspension tweaks and anti roll bars (new to me) on the wide bodies - I don't think there was a whole lot of other changes. Having owned both, I can tell you just those changes alone with the bigger tires/wheels really do change the way the car rides and handles on the street. My '15 Hellcat was great on long trips, but I think this wide body will be even more nice if that's possible! I'll find out this summer....