What is the difference between Server 2012 and Server 2012 R2?
Server 2012 is the original release while Server 2012 R2 is the second release. R2 has additional features, updates, and security patches. Some of the key new features of Server 2012 R2 are Storage Tiering, Storage Pinning, Desired State Configuration, and Work folders.
Upgrade vs Clean Install When Installing Server 2012 Standard
You may be able to upgrade to Server Standard 2012 If one of the following are currently installed:
- Windows Web Server 2008
- Windows Web Server 2008 R2
- Windows Server 2008 R2 Standard with SP1
- Windows Server 2008 Standard with SP2
- Windows Server 2008 R2 Enterprise with SP1
- Windows Server 2008 Enterprise with SP2