Ethical egoism propagates that moral conduct should be judged only by self interest. It provides ideal results for the individual without any thought for the people getting affected by it or due to its consequences. It is considered ethical as it benefits the person with no emphasis on its consequence to other people affected by the egoism.
Utilitarianism primarily focuses on collective growth and betterment. Morality is judged when it provides larger benefits to the entire community than just an individual. It views a conduct to be ethically correct if provides greater good for people. Lesser harm to people along with everyone's interest in consideration.
Both ethical egoism and utilitarianism differ in its approach and results driven out of it.
