Interesting.
The only thing you really need is a auto load system.
There already is a auto save system, so you need to host both servers from the same computer and let one save to a certain file and let the other load it after the first one is done saving.
But what I fear is when it loads on the other server, it has to delete all bricks first, otherwise events or deleted bricks are still there. This can break the current deathmatch because everyone dies of fall damage or gets stuck in bricks.