zerocover

I've got a brake job coming up and have decided to either do Balo rotors or Brembo rotors.

The strange thing is that 2 part numbers are listed for each manufacturer.

Both have W0133-1616059 and W0133-1611307 listed as compatible front rotors for a 2007 C280 4matic, also they are exactly the same price.

Does anyone know the diffrence between the two part numbers? This is a little strange to me.