Intro: list general topics you'll be discussing
Body paragraphs: I find alternating works best. i.e. para1: blah blah text 1. para2: similarly/dissimilarly in text 2 blah blah blah. etc.
Conclusion: depends on essay question. if its to what extent are these texts similar or whatever, then you'd make a judgement
but seriously!! you will go through all of this and more in class!!!