Multiple questions in one but here are my main questions:
Will WebDiff identify images that don't display (missing images)?
Will it identify changes in behavior of sliders or carousels, accordions or tabs?
Will it identify visual changes resulting in changes outside the site such as browser updates?
Will it find malicious code injection, pages, files, images, popups in the event of a site being hacked?
Will it monitor WordPress sites you don't have access to log in to?