This is a key point.
More than likely, even if both planes miss the buildings except for one wing, the resto the planes will simply smash into other parts of Manhattan.
Your looking at 1,000 dead easy.
Even the first plane that was heading south considering that WTC stood almost on the end. Then they were wery tall and the motion of the plane itself were hundreds of km/h in a horisontal way. Wouldnt the plane begin to spin around on its axis while it decended in a 45 degree angle?