Каким образом герои фильма "Мой кузен Винни" отличили Понтиак Темпест от Бьюика Скайларк по следу протектора на обочине?

The car that made these two equal length tire marks had positraction, can't make those marks without positraction, which is not available on the 1964 Buick Skylark
positraction- It's a limited slip deferential which distributes power equally to both the right and left tires. The '64 Skylark had a regular deferential, which anyone who's been stuck in the mud in Alabama knows, you step on the gas, one tire spins, the other tire does nothing.

there's more, when the left tire mark goes up on the curb, and the right tire mark stays flat and even, well, the '64 Skylark had a solid rear axle, so when the left tire would go up on the curb, the right tire would tilt out and ride along its edge, but that didn't happen here, the tire marks stayed flat and even. This car had an independent rear suspension. Now in the 60's there were only two other cars made in America that had positraction and independent rear suspension and enough power to make these marks

One was the corvette, which could never be confused with the Buick Skylark. The other had the same body length, height, width, weight, wheel-base, and wheel-track as the 64 Skylark, and that was the 1963 Pontiac Tempest.