Tough choice! It's really about what you like best I think after reading your post. I love my Camaro but at the same time, the Challenger is right there with it! Looks wise, I think the Challenger has the top spot. Luxury and performance at it's best for an American muscle car. Camaro has performance first then luxury (if you get the 2SS or 2LT). Almost two different cars but the same.
If I could pick only one...and I didn't plan to track the car (which I do with my Camaro)...I'd buy...IDK...I don't have to do that so I can't say which!! LOL!
Either way, you'll love both. The Challenger is comfort, luxury (SRT8), performance (SRT8), retro looks are the best of the 3 current muscle cars where as the Camaro is performance, cool looks, and comfort (2SS).