I think they are both great cars. I came close to getting a GT PP when they were doing 0% for 72 months with rebates a few months back.
I can say this, although it drove nicely on my test drive, the MT86 trans has a lot of documented issues, and this is true for the 15+ models as well. It really should always come down to what you like more, but if you want a winner the camaro is the one to buy. Of course, you'll have to wait to get your hands on one but it really shouldn't be much longer anyways.
I'm on the fence between a camaro and a scatpack challenger personally. To me it's all about what you like the most so when I drive the '16 SS I'll have driven all 3 and can confidently choose. The Mustang is an awesome car, having trouble picking is a great problem to have
