Compare To or Compare With
Compare means to examine two or more things in order to note similarities and differences: to compare two styles of shoes. Compare should be followed by to when it points out similarities between two apparently dissimilar things: He compared her hairdo to a string mop.
Compare should be followed by with when it points out similarities or differences between two entities of the same general class: The diner compared the crème brûlée with custard pudding.
This is another rule that is so frequently broken that it doesn’t really matter anymore whether you use compare to or compare with.
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