I would like to be able to compare two emails or websites, created in Acoustic, and have the tool highlight the differences between the two creatives. Ideally it would compare not just text but imagery two and show where the differences are.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

What I am hoping is that when Acoustic creates a "View Online" version of the email we can cut and paste the two urls into this tool and it would show me a representation of the two emails side by side - similar to how the Diff Tool works for banners.

Benefits (why should this be implemented?):
Similar to how the banners team uses the Diff tool to easily represent control vs test in reporting it would be great do this in email and in donation forms as well.