Basically, the pre 96 cars have a much simplified computer, and are usually exempt from most emissions testing. If your state has emissions testing you'll probably want a pre-96 to avoid all of that. Also, due to the lesser wiring, the pre-96'ers are easier to swap.
As far as the actual body of the car, the metal and mechanicals of it, I dont know of any differences. They added a bolt-in bar under the rear seat (though I dont know why), they changed the bracket for the tire jack, and i dont know of any other differences.
BTW, interesting username, you from northern michigan?