Devin - never have I been told to write an essay in anything other than third person so I'm not sure if that will help. Joe - compare the things they have in common and what they don't. Make sure you don't use words to do with your opinion.
This is my comparison between such and so. An analytical contrast between this and that... Hope I helped :D
Thanks =D it took me a whole frickin hour later but i finally got it lol