Can someone explain to me what the difference is between GM and AIG?

It seems to me that:

1. Both companies were run into the ground by incompetent management who were motivated by greed rather than the good of the company.
2. Both companies can only survive by the largess of the American taxpayer.
3. The failure of either company would have a disastrous effect on the U.S. economy (so we are told).

It appears that if your business is finance then the bailout gravy-train comes fast and with all the goodies.  If you actually make something then the bailout gravy-train comes slow and chunky.