The First world is over or pefectly devoloped with higher class than normal. Third is unpleasant under devoloped world. Both are different of each other by how much money, housing, food, & sometimes colthes. It really depends. Both are alike by, they are both people they both are living in the same world, & usaully they both have money weather little or large. There is something wrong with our world. We should help those people so we can both live happy lives.