Except it's not the same components lol Samsung makes its own components, Samsung makes better quality components, hence the reason Samsung costs more than Changhong.
Go buy a Changhong and go buy a Samsung with similar specs, run them for the next 3 years simultaneously, tell me which one has better picture quality at the end (if the Changhong even makes it that long) and it's not a decision to "let's slap it together better" during manufacturing that determines it.