compare to (with) ?

http://homepage.smc.edu/quizzes/cheney_joyce/Comparewithcompare.html

To identify either the similarities or the differences between two things, use "compare to." To identify both the similarities and the differences, use "compare with." In comparing with something, one finds or discusses both things that are alike and things that are different. Answer the questions below and then click "submit" to send your answers.