Motorcraft Coated Service design rotors

[akiraproject24]

Looking at some rotors on Rock auto. They list NBRR49 coated Motorcraft rear rotors.

Are these the same as OEM FiST rotors with added corrosion coating?

* i ended up just grabbing the non coated oem. I saw on some other Ford forums that they were using cheaper materials for these. I couldnt confirm one way or the other so decided to play it safe. Will probably do whoosh or EBC rotors when I do all four corners.

 

[akiraproject24]

They appear to be almost half the cost of the BRRF207 which makes me skeptical