My first N3 was a white 900T, the back had no stampings and the home button was the one that could shift and look un-even, basically what all note 3 have. My N9005 was also this way & my 900P too.
Today I received another 900T which took some heritage from the NOTE 2 & has the silver living with the same kind of button used in the N2 that could not slide around and makes it tighter. This one also has the body stamped with device model # in the plastic unlike any of the other N3 which did not. It is also now Stamped TM in grey on the bottom. The Blacks are also not as sharp on the new N3 screen is more washed out but barely.... But I dont know if that is the glass screen protector or not.