they're not different takes, they're different aspect ratios.
"My intent was to have the movie, the entire film, play in a gigantic 1:43 aspect ratio on a giant IMAX screen," Snyder said at Justice Con. "Superheroes tend to be, as figures, they tend to be less horizontal. Maybe Superman when he's flying. But when he's standing, he's more of a vertical. Everything is composed and shot that way, and a lot of the restoration is sort of trying to put that back. Put these big squares back. ... It's a completely different aesthetic. It's just got a different quality and one that is unusual. No one's doing that."