SQL Server 2012 Migration to Windows Server 2012 R2

We currently are running SQL Server 2012 SP2 CU1 on Windows Server 2008 R2 SP1, and looking to change to Windows Server 2012 R2, not sure at this point if we will be running Full Windows Server 2012 R2 or Core.

Is there any recommendations on moving SQL Server 2012 to Windows Server 2012/R2?

DJ