There is a new worksheet format for standard subscriptions..
The difference between version 1 and 2 can is a new column GUID- see highlighted section in version 2 screenshot below. The GUID column is the subscription ID. This is for information purposes only in the Excel file.
If you have the enterprise version when restoring of subscriptions it will allow you to export a CSV file giving a translation between the old/new ID values. Useful if 3rd party database tables tie into the subscription ID.
the version number can be seen in cell B1
Version 1
Version 2
