The 2017 Corvette Grand Sport brought 460 horsepower and the Z06’s wide body for around $66,000. The refreshed Porsche 911 Carrera S made 420 horsepower from a twin-turbocharged flat-six and cost closer to $104,000. On the spec sheet that looks like a rout, and then the test results came back and refused to line up with the numbers. Here is where each car actually wins, and why the price gap does not settle it.