2 sites with same content?

Hi,

I am trying to find out how I can have two websites with the same content but with difrent themes. I guess multisite doesn’t help that. I also tried to use RSS importer to import post from the main website, but it doesn’t import the photo’s which I really want to have in the posts. Does anybody else have any advise what I can do?

I want to use a diffrent theme for my mobile view without useing a theme switcher.

Please help me out ??