Only reason why the Rih stans are so eager to defend their fave is because of Rih's floppage lately. It's not 2011 anymore, it's 2013, and Rih is flopping to the end of the charts. So yes, you can go on and keep thinking that WFL is the bigger song when Roar is the bigger radio hit, and is going to sell more. Numbers don't lie.
Personally, I think they were actually equal in size. Both have moderate impact (nothing groundbreaking) and both were huge.