that was wood floor
Let me see If I have your question right...You are asking if you can remove a wood floor that was laid on a cork floor?
should be easy enough, if this is set on a slab then you may need to do some serious scrapping. If set on a wood sub it will be just like any other nail down.
Just as KMS said. What will make them hard or easy will depend upon how the floor was put down. But you can forget about the cork as any nails, screws, glue etc will have destroyed the surface of the layer below.