3c75ebfd_e_Comparison___RacingBrake_com__Benefit
[Features] Surface coating [Competition] Bare or zinc plating [RacingBrake] EDP coating [Benefit] 
EDP offers better resistance to corrosion with uniform surface coverage on both edges and recesses (inside vanes). Better appearance and more environmental friendly.
Feature Comparison - RacingBrake.com
Benefit