difference between MSI r9 290x and ASUS r9 290x?

Max33

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May 5, 2014
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I'm soon going to be buying a computer so I'm researching a bit. While looking at graphics cards I've noticed that there are different kinds of the same graphics cards. I will probably be getting the gtx 780ti but I'm using the r9 290x as an example here. What is the difference between these and what is the best:

Sapphire radeon r9 290x
Asus radeon r9 290x
XFX radeon r9 290x black
XFX Radeon r9 290x
Sapphire Radeon TRI-X r9 290x
MSI Radeon r9 290x gaming

I've noticed that the pricing is fairly different so I'm guessing the differences are greater than just color and manufacturers. Thank you for helping a noob out :) solution will be picked eventually
 

Max33

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May 5, 2014
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So for some reason I can't reply on phone so I'll just write here. What does pcb mean? Also is cooling the only difference? And which one is the best?