What is difference One X-One X orig.android Dev.thread

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http://forum.xda-developers.com – Why are there two threads for One X Android development, the one is called One X Android Development, and the other one is One X Original Android Development. Are there two versions of the same phone or what. I'm just asking because i don't want to make a mistake when I'm gonna flash it. Thanks to all for replying this. :) :confused: (HowTos)