There is one major difference between East and West Egg, and that is the kinds of people that live there. In East egg, live people that have family money, that is money that came from parents or grandparents. Their ancestors succeeded in business or other fields and accumulated money that they passed down to their family. They do not like the people that live in West egg because of the way that they accumulated money. Tom and Daisy Buchanan from The Great Gatsby live in East Egg.
The inhabitants of West Egg became wealthy very recently through successes in business or some other form of trade. They do not have wealthy ancestors, these people are called New money. Gatsby lives in West Egg because he was poor most of his life and only recently came in to a great deal of money from selling alcohol illegally. He is involves in bootlegging and that is how he was able to buy his house in West Egg.
This is the only difference between the areas of East and West Egg.