Comparing Heatmaps is a great way to gauge whether changes made to a page are performing as expected or to compare the results of the desktop version with the mobile version.
From the Heatmap reports dashboard, click the snapshot name drop-down (in the top-left corner) OR the horizontal dots in the far-right corner, then select Compare Heatmaps to reveal a list of all your Heatmaps.
Locate the Heatmap you’d like to compare, then click Compare.
This will display both Heatmaps side-by-side for comparison.