I'm reading through the November issue of Hot Rod Magazine and ran across another comparison. Here's a hint: the red car wins. 
http://www.hotrod.com/featuredvehicles/hrdp_1211_2012_chevy_camaro_zl1_vs_2013_ford_shelby_gt500_mustang/

http://www.hotrod.com/featuredvehicles/hrdp_1211_2012_chevy_camaro_zl1_vs_2013_ford_shelby_gt500_mustang/
