The easiest way to tell a Porsche 911 Turbo from a 911 GT3 when they're running wild on a fast circuit like the Green Hell and on top of that, they're plastered in black camouflage, is to try to take a look at the exhaust pipes.
You see, the milder Turbo edition has two outlets on either side of the rear diffuser while the rougher GT3 sports two centrally mounted pipes.
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