Chernobyl was a whole different ball game. It's effects on humanity, just as the bombs on Hiroshima and Nagasaki still prevail to this day. The ground is still iradiated, and children are still born with defects and there are high rates of Lukemia. Oil can be washed away, and does not infect people with diseases long after it is gone.
Doesn't make the oil spill any less bad, all I'm saying is that the comparison is not fair. Not least of all because not a single soul has been lost... or am I wrong?