I've driven both, and also the Adrenaline Collection Mustang GT.
For me, I'd take a Camaro SS.
The Dodge is nice, and if you need to put anyone in the rear seats, it is probably your best option as the back of the Camaro and the Ford is not a place for adults to sit for long.
I published my assessments:
Challenger R/T
Camaro
The Mustang rental was only a few days ago and I've not finished the review yet.