The primary difference between research and review articles is that research articles describe a particular project and all of the involved components. Whereas review articles describe an entire area of research and all of the relevant studies working toward a similar goal. The research article has the level 1 headings summary, introduction, methods and materials, results and discussion. It also contains level 2 headings in the methods and results, both covering specific parts of their respective sections. In the review article, the level one headings include an abstract, an introduction, sections for myrmecomorphy, myrmecophily, and myrmecophagy, as well as a brief discussion at the end. Like the research article, it also has level 2 headings.
I found it interesting that the review article contained more level 2 headings, but it makes sense since the review is drawing from so many different sources. Also, the writing style of the review came off as more digestible because it was meant to describe a more broad topic.
Comments
Pay attention to grammar and punctuation
"Whereas...." clauses cannot exist alone, something has to come before or after them in the same sentence (think of "if" or "when" statements). Too many uses of "the" throughout the paragraph. For example, in the second sentence, since you are talking generally about review articles, you can eliminate "the" and say, "Review articles have level 1 headings: summary...discussion". Otherwise, very good content!