Contrast discusses differences (properties each have that the other lacks).
Questions to consider
It is not enough to merely list what is the same and what is different. Why is it important to see what is the same and what is different?
What overall pattern is operating in the similarities and why does it matter? How does the comparison enhance our understanding of the separate entities?
What is the cause of the differences and why does it matter? What unique and new insight comes from contrasting the entities?
The answer to these questions will form your thesis statement. The thesis must make a claim that goes beyond the listing of similarities and differences and creates a new understanding, a weaving together of separate strands to make a new form. This new synthesis becomes your thesis.
Your assignment is to compare a book to a movie based on that book. To merely list the plot similarities and the divergences from the plot could be done by anyone. Put in your own analysis, something only you can come up with.
Follow your plan. Include a paragraph breakdown in your plan. Whether individual points warrant an entire body paragraph or certain points can be combined depends on the length of the paper (which dictates scope and depth).
The order of the paragraphs depends on what you want to emphasize. Be sure to start and end body paragraphs with topic and concluding sentences.
Look back at your introduction and thesis and again answer the “why do we care about this?” question in terms of the big picture. The conclusion will accentuate the lessons learned in the comparison and contrast of the elements. What is the new synthesis that has come out of this exercise?