Anybody know the difference between the 200 Cobra R 13 rotor and the 94-04 Cobra 13 rotor?  I know the calipers are different 2 versus 4 piston but was wondering on thickness, venting, backspacing???

OBTW If this doesn't work for me I may have a brand new set of Brembo Cobra 13 inch rotors for sale.  Also, If anyone is looking for the Red Mustang Cobra calipers, they are now selling for $229 new