Versions are useful as they allow switchover functionality enabling a user to both enter a forecast on a line and see actuals in the same line item. However, comparing versions to eachother (any version to any other version dynamically) requires a "Versions List" and logic to engage that list with the Version you want to pull with [SELECT:VERSIONS.(verions name here]. If Version could be a format of a line item, then Anaplan reporting out of version would be greatly enhanced as these version formatted line items could be used in Lookup statements.
The content in this article has not been evaluated for all Anaplan implementations and may not be recommended for your specific situation.
Please consult your internal administrators prior to applying any of the ideas or steps in this article.