Difference between Windows Server 2008 and Windows Server 2008 R2

Windows Server 2008	Windows Server 2008 R2
It is based on kernal version 6.0 ( the same of Windows Vista)	It is based on kernal version 6.1 ( the same of Windows 7)
It use the same GUI introduced with Windows Vista	It use the same new GUI introduced with Windows 7
Is for both 32 bit & 64-bit platforms	Is only for 64-bit platforms
Its Hyper V does not have that feature	Hyper-V provides a dynamic, reliable, and scalable virtualization platform combined with a single set of integrated management tools to manage both physical and virtual resources
Not available in Windows server 2008, It is only having Basic Remote desktop Services.	Microsoft RemoteFX,  introduces a new set of remote user-experience capabilities that enable a media-rich user environment for virtual and session-based desktops.
Normal Power Management Service	Enhanced Power Management services which save up to 18 % more power than previous verison.
Normal Data managemnet server	Enhanced Data Management server using File ClassificationInfrastructure (FCI)