I've ridden in one of these before and they handle great.
Honestly if you combine this and the hellcat it would be the perfect car.
The 500 lbs less really shows in the corners on the e55.
The maintenance and amount of electronics and other parts are not that necessary in the e55, air suspension should be deleted.... etc etc something the hellcat excels in is keeping it simple.
Exhaust notes are very similar.... s/c v8, the hellcat is more throaty and muscular, the e55 is a bit lighter in tone but screams more in the higher rpm range... really a wash here.
Gadgets, only things missing in the hellcat that annoyed me were the lack of acc, no rain sensing wipers, no front camera/parking sensors, e55 has these. The massaging seats are great for longer drives, not really a must have for daily drives unless you go through heavy traffic.
Modifications, both have great tuning and parts availability, hellcat has the edge in the transmission both in strength and shifting capability, also pretty sure the motor can handle more mods, e55 needs to be strengthened overall but both are able to be modded.
Comfortability, e55 has tighter bolsters, hellcat wins though due to room and and storage area for phone.
Backseat - hellcat wins, no rear heated seats for e55 for the taxi passengers.
Both are definitely the best of their respective era's the e55 was a Ferrari killer, the charger hellcat on radials is a lamborghini killer.
At the core they are essentially the same vehicle minus the mercedes benz fit and finish + amenities.... they are sedans that have beefed up internals and are supercar killers.