Compared to Server 2012, Windows Server 2016 has many features, we listed some aspect that have mentioned in the official page and some new features that Windows 2012 doesn’t have
This official page compares Windows Server 2012(R2) Standard and Datacenter to Windows Server 2016(R2) Standard and Datacenter from the following aspects:
Server 2012 wins at each and every aspect, fully supports all of them, while Server 2012 has limited support on most of listed items.
This page (www.tomsitpro.com/articles/best-windows-server-2016-features,2-1061.html) has many introduces on Windows Server 2012, the following list is the 10 best new features of Server 2016:
And in the end of that page, the author emphasis that Windows Server 2016 focuses on the Compute, Virtualization, and Security subsystems