SELECT
PackageID,
ReferencePackageID,
ReferenceName,
ReferenceVersion
FROM
v_TaskSequenceReferencesInfo
WHERE
(
PackageID = @tsid1 
AND
ReferencePackageID not in (SELECT ReferencePackageID FROM v_TaskSequenceReferencesInfo WHERE PackageID = @tsid2)
)
OR
(
PackageID = @tsid2
AND
ReferencePackageID not in (SELECT ReferencePackageID FROM v_TaskSequenceReferencesInfo WHERE PackageID = @tsid1)
)
ORDER BY ReferenceName