One quick way to tell the new 911 apart is to look at the mirrors. They're mounted farther away from the windows, down lower on the doors which is better for aerodynamics. The new car is also slightly lower to the ground.
With the new car, Porsche engineers wanted to improve airflow for performance, reduce lift at high speeds and improve ventilation for things like the brakes and transmission. But doing that can hinder aerodynamics and hurt fuel economy.
The 911 already had one of the best aerodynamic profiles on the road and engineers didn't want to lose that benefit. With a few design tweaks, like those mirrors, they managed to improve performance while keeping the "slipperiness."
While most Chevrolets are fairly ordinary cars, a few make history and sell for huge sums of money.
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