Windows Server 2008 R2 SP1 (October 2013 build) represents a highly stable, final-tier iteration of the 2008 R2 lifecycle. This specific version is "better" because it integrates several years of post-SP1 hotfixes and security rollups directly into the installation media, saving hours of post-install updates. Key Benefits of the October 2013 Build
Pre-patched with all critical security and stability updates through October 2013, saving hours of post-install update cycles. Enhanced Virtualization: Hyper-V Dynamic Memory windows server 2008 r2 sp1 preactivated enus oct 2013 better
for tighter control over remote connections and application execution. Stable Core: Windows Server 2008 R2 SP1 (October 2013 build)
Here is a breakdown of what each part of that text signifies: Windows Server 2008 R2 Want to learn Group Policy Management, DNS, DHCP,
If you are looking for a server OS, it is highly recommended to use modern, supported versions: