Plato and Aristotle both have been very influential as the ancient Greek philosophers. Aristotle was a student of Plato and there are many similarities between these intellectual giants of the ancient world but there are also many things that distinguish them from each other. Aristotle was far more empirical-minded than Plato.
First, Plato's philosophy relegated the material, physical world to a sort of metaphysical second class. His contention was that the abstract truths of the mind-mathematical truths, moral and normative truths about ideals-are what really matter in life and in philosophy, and that the empirical world around us consists of merely poor copies of these ideals. By contrast, Aristotle did as much or more work in what we would today call science (physics, biology, etc.) as in what remains a part of philosophy. While Aristotle certainly did important work in ethics and related areas, he concentrated as much or more on examining the material world. Plato can be read at times as being quite disparaging of science. This is not true of Aristotle.
Second, the difference in the approaches and values of these two philosophers resulted in very different political philosophies. Plato's political philosophy, which can be found principally in the Republic. For him, the just state is one ruled by ascetic philosophers who have been raised from birth not to value material reward or exclusive human connections, even with their own kin. They are the ideal of wise, objective, fair-minded, ultra-rational beings. In contrast to Plato's utopian political philosophy, Aristotle's political philosophy, which can be found principally in the Politics, has a large component of descriptive political science. When he does argue for certain political schemes, they tend to be incremental improvements on existing systems.
Like his teacher Plato, Aristotle's philosophy aims at the universal. Aristotle, however, finds the universal in