Describe utopian socialism how is it different from communism?

Some forms of Utopian socialism share a lot of traits with authentic Marxist communism. The major difference between the two is Marxism is based upon "scientific socialism", and is a predicted outcome that Marx made based on the observations of society and history. Communism is based upon the materialist conception of history, while Utopian socialism is usually devoid of economics and the social forces, such as class conflict, that are forcing society to progress toward socialism.

In short, utopian socialism is simply a set of goals and an outline for a society people would like to have. It can be technocratic, meritocratic (as in the case of Simon) or egalitarian (as in the case of Fourier) and communal (as in the case of Robert Owen).

Communism, in the Marxian sense, is the end result of a historical struggle that is observed throughout history and by examining social and economic relationships.