1. Wrong section, don't worry, hopefully someone moderator wil move this post soon to the general or Q&A section...
takju : Mobiles which brought from Google play store in USA comes with takju build and it has a Google wallet pre-installed. In these device android updates pushed by Google itself and these device are almost first to receive an android updates
yakju : Mobile which brought from Google store but outside of USA, Updates are also pushed by Google, but updates might delay by some days or weeks."
Samsung Galaxy Nexus
(the best Android phone ever)
Sony Xperia tablet Z (LTE):
My built CM7
Android for Samsung Jèt: