Thanks guys. I think they both use the same carbon fiber infused metal. The Advance Tech rotor's vanes are OEM configuration, the ones in the Police rotor are different, supposedly to help dissipate heat better.
Where I live my car isn't exposed to salt so I dunno if the extra corrosion coating on the Police rotor will be any benefit. I don't do hard braking for a living, but like the other day on the freeway when I had to go from 65 to 0 in an instant, I want to stop FAST.
Just wondering if the Police rotor will give my car better stopping distance in those rare events, or if it will last longer than the Advance Tech one.