I don't want to tell you what to expect, because I don't fully know, yet. But here are some numbers to throw around.
While the Camaro is a muscle car true and through... I think of the Challenger as more of a "boulevard bruiser" than a muscle car.
Expect a Camaro around 3700 lbs, and top-line around 430 hp.
(courtesy this site
)
Expect a Challenger around 4100 lbs. and top line around 425 hp (courtesy insideline.com)
You decide