There are many versions of Blade Runner, and that seems to be true of many movies (not to mention that projectionists routinely removed frames for one reason or another).
One of my friends saw a first-release copy in London, more violent and without any voice-over. Presumably shipped before the final American theatre release was cut.
But the main thing I noticed about the commercially re-released “Directors Cut” (which still did have intrusive stupid voice-over) was that there were scenes where the extra couple of seconds just slowed down the action, and didn’t add anything to the development.