They're minutely different shots. I don't see why one would have any question over why they were used over the "original" none the less contact busy people to ask them why in the BD version Picard's standing there in a slightly different manner looking at a Borg with his head turned in a slightly different way. That's pretty much the very definition of the detail-obsessed super fan that gets made fun of in comedy against Star Trek fans.
It'd be one thing if they were radically different scenes in the episode that caused real, meaningful, changes to the story. But it's not. It's a slightly different take that ends in mattering almost not at all.
But, go ahead, eMail the Okudas about it as pester them on why these slightly different takes were used. I'm sure they have time or even the realization that such stark, series-destroying, changes were made to find the answers.