Bush was faced with an OBL who was still very powerful and in much better health, a much harder target. Obama bin Laden was faced with a man in very poor and getting worse health and with only a fraction of the power and control he had 10 years ago. He was also under the impression that he could hide in plain sight. A much easier target.
Sorry Barry, you shot a fish in a barrel. W was faced with trying to hit a very fast moving target.
According to The Washington Post, the US government concluded that Osama bin Laden was present during the Battle of Tora Bora, Afghanistan in late 2001, and according to civilian and military officials with first-hand knowledge, failure by the US to commit enough US ground troops to hunt him led to his escape and was the gravest failure by the US in the war against al Qaeda. Intelligence officials have assembled what they believe to be decisive evidence, from contemporary and subsequent interrogations and intercepted communications, that bin Laden began the battle of Tora Bora inside the cave complex along Afghanistan's mountainous eastern border.[132]The Washington Post also reported that the CIA unit composed of their special operations paramilitary forces dedicated to capturing Osama was shut down in late 2005.[133]