Just a few differencies compared to the beta map we have.
I made use of my "SemiBeta Bandage".
The Med-Station used to look like this, also, no slaughter scene, and no door next to the computer.
(Only one screenshot to prove it as this version hasn't been recovered yet.)
Also note the different textures and the absence of blood pools.
The cell block.
The armor room used to be "round". One version shows the round part to be decorated with lockers. I decided to remake this as well.
A different duct.