Different front facia with additional air intakes for cooling, different front grill, different front splitter, headlight is the cold air intake, Hellcat gets the vented hood, unique wheels/brakes, bigger rear spoiler.
1500?! You want it to weight as much as a BRZ? Not sure how much the S/C adds, but the previous 392 SRT was about the same weight as a ZL1.
The new interior is awesome though, and the Hellcat exhaust sounds amazing. It's definitely a grand touring car, or more true to the Muscle Car DNA; a large, comfortable sedan with a lot of HP.