SharePoint - Perform a full comparison migration - Speed Difference

Hi all, I see a new feature has released, for SharePoint list items you can now Perform a full comparison migration.

Has anyone used this yet that can comment on the timings of running with this option compared to the "Perform an incremental migration" and "Migrate All List Items" options? 

I'm just looking for an indication on weather its "Slower than incremental, but faster than All Items" type feel for what to expect. 

Thanks