As for the thesis examples, one can compare or contrast two phone models. There are various ways to solve this problem. The easiest and most actual comparison is the one where the phones with IOS or Android operation systems are being compared and contrasted. The example of a thesis statement could be as follows. “The comparison of IOS and Android phones reveals that phones with IOS operation system have more benefits than those which have Android system”. Another example could sound: “The research paper tends to explore the main similarities and differences between the IOS and Android operation systems so as to draw a conclusion which of them is the most effective”.
Teacher: I learned a lot about alligators and crocodiles from that passage. I noticed that the way the passage compared and contrasted alligators and crocodiles really helped me understand the ways that alligators and crocodiles are the same, and the ways that they are different. I also noticed that there were certain words and phrases that I saw as I was reading that let me know that this was a compare and contrast passage. Let's go back to the passage now and see if we can find any words or phrases that let us know that the passage is comparing and contrasting two types of animals. [Teacher and students read through the passage again, and create a list of compare-contrast words and phrases that includes both, similar, but, different, compare, and to tell apart.]
Although this sentence has a contrast transition , the criteria for contrasting are not the same. The criteria used for Aaron are height (tall) and strength (strong). We would expect similar criteria to be used for Bruce (maybe he is short and weak), but instead we have new criteria, namely appearance (handsome) and intelligence (intelligent). This is a common mistake for students when writing this type of paragraph or essay. Compare the following, which has much clearer criteria (contrast structure words shown in bold).