In 2002, McNabb was well on his way to being the best fantasy player until he got hurt.
If pass tds are only worth 3 points and manning let's say gets 35 and McNabb gets only 25. That's 105fp for Manning and 75 for McNabb. But Manning probably won't have any rushing TDs and McNabb should have around 5. That's an extra 30 points for McNabb bring his total to 105. Let's say Manning get's roughly 4,500 pass yards; at 30 yards per point that's 150 more points. McNabb should get at least 3,500yds or 117 points. Now let's factor in the rushing, Manning will probably have around 100 yards; at 10 yards per point that's 10 points. McNabb should have about 500 rush yards; which translates into 50 fantasy points.
Now let's add the totals:
Manning = 265 fantasy points
McNabb = 272 Fantasy points.