Can Inductive Proximity Sensors Differentiate Between Steel and Copper?

Hello, I'm new to this forum so i'm sorry if this post is in some way incorrect. My question is: Can an inductive proximity sensor tell the difference between steel and copper. I am working on a project building a vehicle than can the difference between types of metals and I stumbled upon inductive proximity sensors which according to some websites have this capability. If anyone has any insight to Inductive Proximity sensors it would be much appreciated.

Thanks

Please post links to sensors that are claimed to have this capability.