Comparison view of plan snapshots

Hello,

Does any one of you have an idea on how to support the below use case?

As a product owner I want to be able to compare the current backlog plan to a an already taken plan snapshot so that I can explain the changes in the "rank" of different items part of the backlog. (e.g. due to finished or new stories in the plan)

Acceptance criteria:
- I can compare the rank of stories inside of snapshots in a "Beyond compare" style (e.g. left side old snapshot, right side new snapshot or current plan).
- I can identify the rank changes for stories or defects which are part of the old and the new plan.

Currently even with a PLAN export, we are not achieve it because the export does not contain RANK attribute at all.

Thank you.