How does the action that a 3rd person omniscient presents contrast to an action narrated by a 3rd person objective?

I can't seem to see the difference.

Omniscient = the narrator knows everything that is happening and how the story will end.

http://en.wikipedia.org/wiki/Third-person_omniscient_narrative

Objective = the narrator is telling the story without emotion or personal involvement and may or may not know as much as a "third-person omniscient" narrator does.
http://www.answers.com/topic/objective-3