Hi @Aaron Cass and welcome.
I think this is possible. With nothing open in Affinity Photo, go to File and New Stack...
Click Add, select both images and leave the default settings in the Stack dialog as they are:
Click OK, wait for it to process.
You'll now get an Affinity Photo document with a Live Stack Group. Click the x with the wavy line over it and set to Median.
Right-click on the Live Stack Group and choose Ungroup (or cmd-shift-G on a Mac).
This will give you two separate aligned layers, one with the old view, one with the new.
You'll need to crop the document to remove the blank canvas behind - I suspect the client won't notice the trimming - and you should now be able to export the two layers as individual images.
Really hope this helps, no doubt others will have better ideas.
H
Aaron Cass got a reaction from h_d in Perspective Matching for the same subject on different shoots