Well as a owner of both a Scat Pack modern Challenger, and the aforementioned Demon with 6.1 I can certainly attest the modern is much easier to drive. That being said guess how many miles I have put on it since I got the Demon running? Honking zero! But in all fairness the performance of the modern challenger is what drove me to do the swap in the first place. I have driven the scat pack across the country three times in total creature comfort. Once I had so many tools with me the car was listing, I mean seriously you could hide three hockey bags in the trunk! But the car is very heavy.