The RPI spoiler rubbed against my fenders in spots and transferred some of the gloss black paint to the green fenders. I removed some of the material on the end that it was rubbing and still had issues so I removed it.
The IKON spoiler is about the height of the 1LE blade spoiler, the RPI spoiler is about 2 inches taller.
I agree with this on the fitment - unless you get it exactly right, there is some rubbing on one side. I decided to just live with it, and I put a piece of vinyl at the spot where it rubs. Only shows when I open the trunk. Otherwise, happy with the RPI