I'll make this simple for you. If you want to rag it out and get wild then a scat pack is what to get due to it being barely any price difference. The scat pack has the big brakes and a warranty to support the actual power which is 405-420whp and 375-400 tq. You can simply put a nice touring exhaust, better wheel and tires, pro kit springs, and it'll look great.
I on the other hand went from a Charger GT 2021 to a Charger RT 2018. This charger rt is faster than scat packs and srt-8's because it is built. full headers, exhaust, tires, custom tune, air intake, stage 3 boost cam 1 of 1 custom cut, full cam kit, thermostat, everything needed to make it faster than a scat pack plus I went from a no options Charger GT to a Fully optioned Charger RT. I got lucky because it was an even trade from a v6 to a fully optioned and built rt with a dealership warranty.