What is difference between Windows Server Standard and Datacenter ?

Windows Server Standard Version

It has unlimited user.

Its minimum requirement is 4TB Hard disk.

It Support All Services such as ADDS,DNS,DHCP,CS,FS etc

It Provide 2 virtual machine free of  cost.

Windows Server Datacenter  Version

It has unlimited user.

Its also minimum requirement is 4TB Hard disk.

It also Support All Services such as ADDS,DNS,DHCP,CS,FS etc.

It Provide unlimited virtual machine free of  cost.