Plotting Euclidean Distance between 2 point clouds with contour scaling

I have 2 point clouds (time-series data, taken at 1 month intervals), and I would like to plot the Euclidean distance between the two point clouds (at all points) using a contour scaling in the same figure as the two point clouds. I am essentially trying to show how the point clouds changed over the duration of a month (Please also suggest if there's better ways I can show this). I have the ED at all points (as a matrix). Please suggest ways I can do the contour scaling part.