I have written several comparison and contrast papers over the years. I like to use this format for this sort of paper:
P1: Intro, gives the reader an idea of what to expect from your paper.
P2: Introduce item/person number one, simply giving the facts.
P3: Introduce item/person number two, simply giving the facts.
P4: Compare the two items/persons, showing important resemblances.
P5: Contrast the two items/persons, showing important differences.
P6: State your conclusion of the topic.
Depending on how much information you have, your paper will be about two pages long using this format. Of course, you can choose to use more paragraphs if you have an especially large amount of information on one aspect of your paper.
This style has served me well over the years, and I highly recommend it. However, if your paper is exceptionally long, then this format will not work.
Better to remain silent and be thought a fool than to speak out and remove all doubt." - Abraham Lincoln