no radio or windshield wipers in a kart.

A bad handling kart would still be a great handling car.

When it rains you get really wet.

Hitting a squirrel or ground hog in a kart is really bad!

No matter how bad you bend it up, a buddy and you can still pick it up and put it in the trailer.

No shocks-you really feel the bumps

They are almost unrelated, except for each having 4 wheels.

The biggest difference by far is that a kart has a solid rear axle.  This means that a kart needs to become a 3-wheel vehicle in order to “turn in” to a corner.

That constant transitioning from 3 to 4 to 3 to 4 wheel vehicle is why karts have track-to-wheelbase ratio, caster, kingpin inclination, scrub radius, and many other things that are totally unrelated to automobiles.

PM