I think the bottom line is that both V6 and SS Camaros have significantly more money put into them than similar trim Challenger or Mustang (or anything else) when you look at the mechanical items. I mean engine, trans, brakes, rims/tires, suspension. But they are still priced very close to the other models. When you look at a 370z, what does it come with that a v6 camaro does'nt? Maybe slightly better brakes and tires, that is about it. The main differences are in the interior, that is why it costs $30,000 instead of $23,000. So it all comes down to how you want to spend your money. For many people, the interior of a more luxurious car may be worth more to them. For me, it is more than enough, and I would much rather have all the goodies the Camaro comes with than an out of date Ford drivetrain, or an overpriced Chrysler drivetrain and a nav screen and a 'soft' dash.
Maybe slamming your fist against a soft dash and programming your nav screen to take you back home when you get your ass handed to you by a Camaro is nicer for the driver?