Someone else will have to chime in to confirm, but as far as I know, the only difference should be the hangers at the tailpipe. That should be an easy fix, as they should unbolt from the car.
I think the 98 catback would interfere with the 95's rear suspension. The 98 has IRS and the 95 doesn't. I think thats the reason the 95's exhaust goes over the rear axle. I could always be wrong though, which my wife reminds me of often
Only thing different is the tailpipe hangers. I know this due to buying a 98 cat-back for 96. magnaflow tails pipes comes with universal mountings. order them now and save yourself the headache