Strictly speaking they shouldnt fit the S Spoiler to none S cars, so it wouldn't surprise me.
Very easy to distinguinse between the Aero and S Spoiler. The Aero is fixed to the top of the boot a the way aong, the S Spoiler comes away from the body at the centre of the car.
Ive attached a ZIP file with al lot pictures of the Aero spoiler so you should know if it is an Aero or not.
(I prefer the Aero)