With all due respect to the prior posts, unless you have two cars set up exactly the same (drivetrain, suspension, tires, seats, etc) there is no way to get a valid comparison between the two cars. The difference in wheel base is so small that it is not a factor. I've owned over 40 of these E bodies, and i can say every one of them drove a little different, and as far as challenger to cuda comparisons, i can honestly say i see no pattern that tells me the models drive differently. It's more a factor of big block/small block, front suspension setup and alignment, tires, frame connectors or stock, rear suspension setup, and general overall condition of the car.
Now how you percieve the cars certainly enters into it. You'd almost have to do a blind driving test....now that would be a neat trick heh?