I didn't flash the stock ROM from the scratch. I had backed it up a couple of weeks back. Just restored it after I bricked my phone while trying to partition my internal storage. So, don't really know how the build number is different.
Erm, that's kinda interesting (the other similar phone). Gotta research a bit on that.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?