I'd bet they are different. I believe the 96 del sol engine harness is a two piece unit like the 92-95 ones but with the plugs for y8 sensors. The 96 civics engine harness is a one piece that runs all the way to the ecu.

Since it looks like you have a 96 del sol is there plugs on the passenger side shocktower that run down to the ecu? If so your car needs a two piece harness and not the one piece 96+ civic unit.