In searching for tools to use when comparing before and after panos. I stumbled across a free online website created by Luke Oslizlo a Web developer and Photographer from Poland.
Below is a project I am currently working on showing a before and after pano of shoreline restoration for a client. Click on below photo to open the website (link will open in a separate window)
Below is a looped video showing the before and after.
Below is the Ortho Comparison using Juxtapose
Below is the DTM with Contours using Juxtapose