Their are two prices for Microsoft Windows 8.1 pro 64-bit (OEM) $128.88 & 133.75. Can anyone tell me the difference, and which is better for a new build?
I doubt you need pro, pro is mainly for businesses that need extra security and the like.
Summarizes the subject quite nicely: http://en.wikipedia.org/wiki/Windows_8_editions
Where you got these prices?
This should help