Nice find!
Did you read that they redesigned the rotors to 340mm?
These rotors measure 340mm in diameter versus OE 345mm. RacingBrake specifically designed these rotors to this size to better align the brake pad with the outer edge of the rotor.
That's interesting...

14lbs all together that you could drop from just changing rotors! I wonder if there are rear two piece rotors out there.