To me its not even a battle, the Challenger is a car thats already lost.
Styling? Challenger is just too retro, sure it looks great right now, but its got that fad style to it that will start to look dated after you see a few of them on the road, the beauty of the camaro is that it mixes the old with the new, its classic but also fresh and modern at the same time. Really an amazing feat.
Engine? Nuff said, cmon does dodge really think its going to compete with GM with all it has under its sleeve in this day and age, dodge better hope some AMG people help them out on this one
Handling? Well we know that the camaro is going to be using more modern suspension systems, so this one is up in the air for now.
Realistic? We already know how close the camaro is to being production ready, not only from annoucements but from the multiple showings of the car, the videos of the engine, exhaust, driving all over the place, etc etc. THis car is coming, its very real, and will be very close to what we are seeing. FOr the challenger they have the annoucements about it being produced, but we dont know anything past that.. They seem to be a little further off then GM is in terms of getting a showcar into the enthusiasts hands.