Thank you for the sharing the resource. I read the same. My case is NOT of two WP instances but instead it is ONE instance. Let me explain the requirement.
I have a single WP instance and mutiple pages in that. I want to split the pages into 2 different domains, as applicable. Say Page 1-5 example1.com and Page 5-11 to example2.com. I want this to happen without redirection. The database being used by these domains and their respective pages are the same i.e of the single instance the pages belong to.
So in a sense for a user, depending on their type, the access their requisite domain at the FrontEnd while being serviced by the same same DB at the backend.
Will multiste help in this case?
If so how can the same be configured?