Split site based on entry page

Hello all,

I am in the process of splitting an existing revo site into two departments. I need a new landing page that will give the user options and based on that choice I would like to display different content and menus. Not all pages will be different but some will need to be different depending what options is chosen.

Is there an easy way to do this without duplicating content?

Any help would be greatly appreciated.

Kind Regards

Yosh