Which is the best os

[GianMarco Douglas]

Is windows 8 pro better than windows 8.1?

 

[ThatVietGuy]

Nope.

 

[Dark Lord of Tech]

http://windows.microsoft.com/en-us/windows/compare
Compare and decide

 

[USAFRet]

Is windows 8 pro better than windows 8.1?

Win 8
Win 8 Pro
Win 8.1
Win 8.1 Pro

You're comparing different things.
Unless you're in a corporate environment, there is little reason to get Pro. Win 8.1 is what you probably need.
And 8.1 is a free upgrade from 8, in either flavor.