Difference between Email handling in Pro and Pro Office

New here and one of the ways I want to use DT Pro is the save my emails from Apple Mail so I can delete them in the Mail App. I saw the comparison between Pro and Pro Office and it appears they both handle email but the Pro version does not support archiving.

I believe it say Advanced for Pro Office and Basic for Pro.

I did place a few emails into Pro and while it shows the basic message, the images attached seem to be missing. Other than this, what is the basic difference?