percentage-wise, Romney donated less. One has difficulty comparing tax returns when one side has refused to release more than two years and the other puts theirs out for the public every year. Then there is the ever so-inconsequential difference in personal income.
Yes - Willard Mitt Romney donated more than Barack Obama, but his income was $20.9 million in 2011 and $21.7 million in 2010. What was the President's income in those years?
Mitt himself stated that he had paid income taxes at a rate of of "at least 13%" - not that he was willing to release the returns for those years but you gotta trust him - right?