The iron in breast milk is more easily absorbed than iron in formula so a breastfed baby will actually get more iron than a formula fed baby. (skepticalob.com)
I am also annoyed by the «extra iron» advertised: yes there may be more iron in formula milk but it is not as easily absorbed as that in breast milk. (babymilkaction.org)
While a baby will only absorb around 5 to 10 percent of the iron in formula, she will absorb 50 to 75 percent of the iron in mother's milk. (easybabylife.com)