Blade Runner has a weird history. There was originally a cut, with no narration but the producers or studio thought it didn't work so they got a bored disinterested Harrison Ford (or is that a tautology) to record some narration for a slightly different edit and that's what was released into cinemas. Thing is, a lot of people though the bored narration actually worked.
Then we got a dvd version that non anamorphic and then finally he bluray and the most recent cut.
Either way, eh.
I've only seen the film twice, once at the cinema on its original release and then again when the blu Ray came out. It's a masterpiece of visuals and features probably the greatest practical effects ever, but I still find the story makes it quite a chore to watch.
Watch what's on Netflix, it's still a very very good and true version of Blade Runner.