How PowerShell Differs From the Windows Command Prompt?

Briefly, the CMD is a simple shell introduced with Windows NT with the same basic syntax and functionality as DOS.
It has relatively limited capabilities, especially when compared to Unix shells.
PowerShell is a modern shell implementation with all sorts of extra goodies.
The Power Shell scripting language designed especially for system administration.
Built on the .NET Framework, Windows PowerShell™ helps IT professionals and power users control and automate the administration of the Windows operating system and applications that run on Windows.

In addition to Ahmad Amin answer, there are some advanced tasks that can only be done from PowerShell.
It can't be done from GUI or CLI.
Also, when you are managing very large number of servers, instead of wasting your time clicking on every server to do the task, you can run a PowerShell script to remotely change the settings on all servers at once, regardless if its only one small change, or hundreds of changes.

Power shell is more usable and more powerfull than CMD .
In other side CMD is simple but power shell is advanced

Windows PowerShell™ is a task-based command-line shell and scripting language designed especially for system administration. Built on the .NET Framework, Windows PowerShell™ helps IT professionals and power users control and automate the administration of the Windows operating system and applications that run on Windows.

Built-in Windows PowerShell commands, called cmdlets, let you manage the computers in your enterprise from the command line. Windows PowerShell™ providers let you access data stores, such as the registry and certificate store, as easily as you access the file system. In addition, Windows PowerShell™ has a rich expression parser and a fully developed scripting language.

 

Windows PowerShell™ includes the following features:

 

Cmdlets for performing common system administration tasks, such as managing the registry, services, processes, and event logs, and using Windows Management Instrumentation.

 

A task-based scripting language and support for existing scripts and command-line tools.

 

Consistent design. Because cmdlets and system data stores use common syntax and naming conventions, data can be shared easily and the output from one cmdlet can be used as the input to another cmdlet without reformatting or manipulation.

 

Simplified, command-based navigation of the operating system, which lets users navigate the registry and other data stores by using the same techniques that they use to navigate the file system.

 

Powerful object manipulation capabilities. Objects can be directly manipulated or sent to other tools or databases.

 

Extensible interface. Independent software vendors and enterprise developers can build custom tools and utilities to administer their software.

 

power shell is more advance then the commmad prompt.
It is easy to use as compare to cmd.
Its interface is user friendly

Powershell is a strong tool used for bulk/advanced administrative tasks in Windows.
cmd is not basically a admin's utility you can say it's just a powerful DOS or DOS++ inside windows.

I agree with the answer added by: Mohammad Oweis

From my experience, i used all of those and here are my finding Sony Dell Toshipa Asus