Can I select any financial plan version for comparison when reviewing a budget or forecast?

Yes. You can select any of the project's financial plan versions to compare with the focal version.

However, if the calendar type associated with a comparison version differs from that of the focal version, then personalized period information doesn't appear for the comparison version. (If the focal version doesn't use a calendar, then no period information appears.)

Similarly, if a comparison version uses a different planning resource breakdown structure, then personalized information for that comparison version doesn't appear in the resource structure view.