I certainly had no idea until this very thread that there might be any sort of difference. Like that Reddit user, I (quite reasonably) concluded that AWD and 4WD were the same thing since a car has four wheels.
Most cars at least :^)
(Technically the full name for it is "4MATIC AWD", but no one actually calls it that.)
Some cars have only three.
when you hear hooves do you think horses, or zebras?
https://tvtropes.org/pmwiki/pmwiki.php/Main/TheCoconutEffect