I assumed it was 7 year newer materials vs the 2016 Hellcat I had, but who knows. Doors shut much tighter, but have a hollow "bonk" sound like they're lightened up somehow. Bracing changed/removed maybe. I also optioned mine, it's not a stripped down example so maybe that's some of it too.
I've started looking at Porsche 991.2 911 Turbo cars and now I understand exclusivity and how that impacts pricing. Mopar folks act like 3300 is limited when a normal production year for a 911 Turbo is measured in 100s. No wonder they hold value.