| 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 version. |
| Normal Data management server | Enhanced Data Management server using File Classification Infrastructure |
