I’ve been missing the data compare tool this since moving from VS 2010. I’ve install the VS 2013 v3 update and then the SQL Server Data Tools - June 2013 update. I don’t think v3 is required, but it’s a good upgrade to do anyways.
http://blogs.msdn.com/b/ssdt/archive/2013/06/24/announcing-sql-server-data-tools-june-2013.aspx
