how were the classification systems of Aristotle and Linnaeus similar?

Answer 1

Like Aristotle before him, Linnaeus used logic in devising his classification scheme. But he introduced a new idea; a hierarchy of nested groups within groups, a system sometimes called hierarchical ordering.

Linnaeus followed the practice, started by Aristotle, of naming each unique form of an organism by it's genus name followed by a differentia phrase. As today, the genus defined the second lowest group and was general a way of describing the set (for example 'canines').

Answer 2

The systems are similar in that both attempt to organize living things based on similar characteristics.