Server Vs. Workstation

[zHostingSolutions]

This is what I think

Here's an example a Ubuntu server (shell access only) is more secure than a Ubuntu desktop. 

The server is designed for advanced users and it has minimal apps running( less back doors)

A desktop is easier for beginners.

Thanks for replying. However, I'm not talking about, like, with Ubuntu, Windows, etc. I'm talking about the computer itself.

There are Server computers, like: Blade Servers, Edge Servers, High-Density Servers, Mission Critical Servers, ‏Rack Servers and Tower Servers.

There are workstation computers, like: ThinkStation.

I'm wondering if a workstation computer or a server computer would be the best for running server software.

I know that a server computer is specialized for servers but I feel that a workstation computer is best for performance, speed and reliability over a server computer due to workstations being built for heavy loads apposed to server-built computers. I hope this clears it up.

I'm wondering what would be the best type of computer:
1. Server, specialized for webhosting and other remote services
2. Workstation, specialized in heavy loads of performance, speed and stability

What would you guys recommend or is there really a difference? I wish I could afford to build a custom computer that will do both.