Well, I guess I meant that the Gen 5 has been slipping a bit. Like, the 1LE super sport is competing with the Laguna Seca, which it does performance wise, and gives you more value for the money IMO. But other than that, when you split all the hairs, the ZL1 is good at certain things and the Cobra is good at others. For example, the Cobra is faster in a drag, (in relative terms - they're both freaking fast), but the ZL1 can have better race track times because of steering and breaking, etc.
I just don't know if I consider this head-on competition. Cobra owners certainly aren't sweating over the Camaros. They're not consistently out-performing the Mustangs.