TP-LINK TL-WN722N .. hardware version number vs. chipset number

Hi there,

I want to buy the TP-LINK TL-WN722N for using with Backtrack5 or Kali, but the problem is that they put different chipsets for the same model, and I want the one with the AR9271 chipset  because I hear it's compatible with BT5 and Kali.

So, ...