Windows Server allows more network connections
On Windows Desktop, network connections are limited to 10 to 20 connections. But Windows Server does not, it can support more, depending on the capabilities of the hardware.
By default, Windows Server versions prioritize running tasks and services in the background. While the desktop version to focus on the task directly (foreground). Although this priority may change, the Desktop version will not be as efficient as the Server version.
If you have Windows 7, 8, 8.1 keys, you can install Windows 10 for free. But Windows Server 2016 is not easy to buy (it's aimed at businesses) and is very expensive. Windows Server 2016 licenses can range from $ 500 to $ 6,200 depending on the size of the business.
With the information above, you have a basic view of Windows and Windows Server and know the difference between them. If you intend to install Win for your home computer to play the game, every Windows 10 and Windows 7 will whip. As for Windows Server, you know where to install it, unless you intend to learn, study, be a network administrator, otherwise you don't need to care about it.