If you are, indeed, speaking of PCMs, then yes and no. The PCMs are the same. The PCM harness is slightly different..
I just recently put a '96 auto PCM and full PCM harness into my '97 auto. I had to change 2 plugs: Crank sensor plug connector was different, as well as one of the three large plug connectors on the top-left of firewall.
Aside from that, everything else was plug-n-play.