Report on Report Server Folder Structure

You can query the backend DB for each instance.

I'm pretty sure there are some sync tools out there. Though not sure if they give you whats different or just align everything using some clever magic pixies.

A query like this gives you what's in the catalog. The underlying GUIDS will be different on the different servers but the overall elements (folders/reports/datasets) etc should be the same.

SELECT	r.ItemID
	   ,r.Path
	   ,r.Name
	   ,r.ParentID
	   ,CASE r.Type
			WHEN 1	THEN 'Folder'
			WHEN 2	THEN 'SSRS Report'
			WHEN 3	THEN 'Branding Content'
			WHEN 5	THEN 'Data Source'
			WHEN 8	THEN 'KPI Dataset'
			WHEN 11	THEN 'KPI Card'
			WHEN 13	THEN 'PBIX Report'
		END AS ContentType

	   --,r.Property
	   ,r.Description
	   ,r.Hidden  -- 0 or 1
	   --,r.CreatedByID
	   ,c.UserName AS CreatedBy
	   ,r.CreationDate
	   ,m.UserName AS ModifiedBy
	   ,r.ModifiedDate
	   --,r.MimeType --only useful for things like images etc.
	   --,r.SnapshotLimit
	   --,r.Parameter -- xml can be used to figure out params on SSRS reports
	   --,r.PolicyID
	   --,r.PolicyRoot
	   --,r.ExecutionFlag
	   --,r.ExecutionTime
	   --,r.SubType
	   --,r.ComponentID
	   ,r.ContentSize
FROM	dbo.Catalog r
		LEFT OUTER JOIN dbo.Users c
			ON r.CreatedByID = c.UserID
		LEFT OUTER JOIN dbo.Users m
			ON r.ModifiedByID = m.UserID
WHERE	LEFT(PATH,37) <> '/68f0607b-9378-4bbb-9e70-4da3d7d66838'	-- ignore branding items
		AND LEFT(PATH,14) <> '/Users Folders' -- ignore user folders
ORDER BY r.PATH;