Hi, Yes as Johnny Dart said... there is a difference ...
The electronic conversion kits came with a ballast matched for electronic ignition. I know my car ran noticeably better when I switched ballasts after the conversion, a lot less heat as I found my coil so hot I couldn't touch it and it effected the spark, coil was cooler following the change. The OHM rating is different from one to the other....Google it or look on here , I cant recall the OHM rating required for electronic..Hummm .5 or .75 sounds familiar...but look around to be sure.