PRESENTATION OUTLINE
Obviously there are many differences between each story, so many I'm not even going to list them. But the important thing is that each one was written for a different purpose.
Hansel and Gretel was written to entertain and teach little kids a lesson, same with the little red riding hood. The birth of Athena is a well known myth. Most myths are made to entertain or to explain something about the world.
There are very little similarities between each story but the main one is that they are all stories made by man for entertainment and other purposes.