Google recently launched NEW Google search (also called Google Caffeine sandbox). It is believed to be improved version of existing Google search. Besides being faster, it produces different results for same keywords as compared to results from existing Google Search.
If you really want to compare results from Google and Google Caffeine, no need to toggle windows. Head over to Facesaerch Caffeine Compare to see results for same keywords on single page. It is handy tool to compare results from Google and Google Caffeine for curious and excited users about this new Google search endeavour!