The Porsche 911 and the Chevrolet Corvette are worlds apart, from a design standpoint. One is rear-engined, with six cylinders yammering away, the other is front-engined, with eight fat pistons bellowing out. Both use the ultimate test of the track to make better sports cars for you.
Which is not to say they don't take vastly different approaches in getting to the crucible of Daytona. Just from these two videos, it's easy to tell the cultural and attitudinal differences between the racing teams.