If you share the whole website content (same DB & same prefix) then the website will have exactly the same content.
The only thing that you could do is to setup the slave site to provide different default menu but google will be able to find all.
If you are using exactly the same DB & prefix then NO, you can not have different setup depending on the website.
The only possibility is to have different website (DB and/or prefix) to be able managing its contents separately.
It is possible to share the content of some extension
www.jms2win.com/en/list-of-extensions?vi...id=269&Itemid=53
K2 is an extension that can have its content shared.
Remark: Some people reported that Google was able to find all the K2 articles event when it does not exists a specific menu entry. In other words, create a specific menu entry that would just make reference to some K2 article may potentially not work if google is able to discover all the K2 items.
The only thing that you can do when sharing the same DB & prefix is to use the free "Search/Replace" plugin that allows replacing some patterns depending on the website.
www.jms2win.com/en/component/docman/doc_...rch--replace-utility
So that, you could for example change the link of some menu to point to another article, or put some keyword in your article to create some variant depending on the website.