I am looking for features added or changes made in SQL Server 2012 SP1 Express - LocalDB from original release of SQL Server 2012 Express - LocalDB. I saw the document how to upgrade from SQL Server 2012 Express - LocalDB to SQL Server 2012 SP1 Express - LocalDB. I am trying to figure out do I really need to upgrade? Any security issues fixed in SQL Server 2012 SP1 Express - LocalDB? Do I need to deploy new 640 MB  file for upgrade?
Thanks.

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