The following document explains the Nearmap feature called Split View or Compare two dates. This feature allows you to compare imagery for a location across two different surveys, so that you can easily see the changes over time.
In MapBrwoser, simply click the Split View button located next to the date box:
Split View FAQs
Can I view different imagery in one side, say Oblique on the left and Vertical on the right?
Currently it's only possible to view the same base layer type in both the left and right frames.
Can I view a different location in each side?
No, the intention of split view is to allow you to compare the same location at different times.
Can I take a snapshot or export the split view?
Currently you can't snapshot or export the split view. You'll need to take a screen grab using tools on your PC or device.