Barack Obama Iraq War Vote Fallacy

As noted in this video, Barack Obama speaks a lot about not supporting the Iraq war; but his actions show us the truth.  From his book, "The Audicity of Hope", he states:

When the invasion was finally launched and US forces marched unimpeded through Baghdad, when I saw Saddam's statue topple and watched the President stand atop the U.S.S. Abraham Lincoln, with a banner behind him proclaiming 'Mission Accomplished', I began to suspect that I might have been wrong......"

In his Senate voting history he voted for all 85 votes on Iraq exactly in the same manner as Hillary Clinton, except in the vote for General George Casey to become Army Chief of Staff.  So, please tell me why he believes himself to be so 'different' from Hillary when it comes to Iraq?  I think this Corrente article sums it all up better than I could ever do it: --> Confessions of an Obama Skeptic - Part I