Contour Interpolation

I have a question about ParaView’s interpolation capability, my goal is to compare two solutions with differing structured meshes, but share the same geometry, initial conditions and flow parameters (they are two slices of a volume at the same location). I want to be able to produce a contour that shows the difference between these two solutions. How would I go about doing this? I am attempting to use the “Point Dataset Interpolator” or “Point Plane Interpolator” but I am having no luck. I would consider myself a novice when using ParaView and I am having some trouble finding information that would help me with my problem. Some additional information is that I am using ParaView 5.9.0. Thank you in advance!

AppendAttributres + Calculator + Contour

Thank you Mathieu!