Originally Posted by Yolina

Having just retrieved my PW1 box as I'm about to put the thing on ebay, the only difference I can see on the black cardboard box is that on the side, PW1 has "Kindle Paperwhite" over 2 lines, and PW2 has "Kindle Paperwhite" over a single line. That's for UK devices, don't know if its the same for all countries.

Edit: pic now attached

Also, you can check the serial number on the box - it seems that all Wi-Fi PW2 start B0D4 (not sure about SO ones, and 3G model not out yet I believe)