So, could this work for two versions of a website page that should correspond to one date? Could I compare a WB machine website page from Jan 2011 with a likely altered page purportedly from Jan 2011 that was used to show something else?
I’m no expert, but it looks to me like it could.
As someone else said (I think), you would only want to examine copies of those files, since accessing or opening the original document could change the content. Sounds like a forensics expert is needed, but what you are looking to accomplish certainly seems doable.
I don’t know how those way back files are generated, but it seems like there should be a way to determine exactly when they were archived.