I downloaded both of these to support my VS 2012 efforts on a new PC. I decided not to go with the new LocalDB version for now because I might also do development on an older PC box with VS2010.
SQLEXPRADV_x64_ENU setup worked fine, my app came up on the new machine (yay!)
When I launch SQLManagementStudio_x64_ENU it starts the same panel as for setting up SQLEXPRADV_x64_ENU. So I stopped it.
I was doing some research but could not parse out what I've got here. There's a new program installed called SQL Server Data Tools, which launches VS2010.
I was expecting to need Management Studio when I'm running my app under IIS to test multiple users, and needing to disconnect the SQL connection when I want to go back to debugging under VS2012 directly (though maybe there's another way to do that). Also, I figured I might make some use of Management Studio at some point.
Any help with understanding the relationship of these downloads and tools would be appreciated.