The IRC Search Box and Google Scholar are both search engines that let you quickly search across a massive index of scholarly information.
The IRC Search Box and Google Scholar search different bodies of scholarly content. There is overlap, but there is content findable in the Search Box but not Google Scholar, and vice-versa. The two search engines perform relevance ranking in very different ways.
Some features unique to the IRC Search Box:
Some features unique to Google Scholar:
The IRC Search Box searches:
Because of the large number of resources available through the consortium and the open access journals, I recommend you begin your search with the search box.