Just looked at some pix on eBay related to a '97 Coupe thats for sale...
Only physical changes I can see from my car are:
1) Different wheels. The '96 came with "8 hole" alloys. I think they also did away with the "staggered" offset front and back.
2) IR Keyless entry system is changed. On the '96, the IR receiver is a small "button" that hangs on the bottom of the inside rear view mirror. It works OK, but you've got to be close to the receiver to make it work. You can forget shooting it from the rear of the car in sunny weather. On the '97, it looks like they went to individual IR receivers at each lock.