Babylon 4 was a mile longer than Babylon 5, it could hold twice as many people, and was equipped with engines allowing it to change locations at will.
Babylon 4 was equipped with a counter-rotation axis, allowing the station to revolve in two directions at once.
The blue spacesuit was on board the Discovery in 2001: A Space Odyssey (1968) and in 2010 (1984), but never used there.
This takes place in July 2258.
In the scene where Sinclair gets blasted into crates, while Garibaldi is helping him up, on the right side of the screen can be seen a film crew member sitting up on some boxes watching. They're wearing a red & white shirt and a ball cap.