All 4 wheel drives are the same, if you stick to that line alone.
All it says is that the vehicle being refered to has a 4 wheel drive capability, regardless of the type of vehicle it is fitted to. If the 4 wheel drive function is a permanant one, say, as in Suburu models, then it is generally accepted that we would call this an "all wheel drive vehicle", again, regardless of the vehicle type.

The term "4 wheel drive", [sometimes reduced to "4x4"] alludes exclusively to this selectable mechanical feature, however, since this feature is most frequently connected to a particular group of vehicle classes, many people incorectly conclude that the term 4 wheel drive automaticly refers to this vehicle category.
In many instances, these 4wd chassis are fitted with either passenger or commercial bodies. Land Rover would be an example of this

I am surprised that you would ask such a basic question.