Yes - Reiger will fit e93. Front, side skirts and rear - all compatible. The only difference is trunk design. Exhaust system is the same on both. Bumpers front and rear are the same too. Suspension is the same although the spring rating is different for the rear. I've got KW V3 - same setup as specified for the e91 touring.
Enjoy your new e93!
Here is a pic with quads fitted and wheels/KWs awaiting install