for both questions i tend to use the same structure. choose 3 or 4 areas to focus on that are in both texts such as lexis, layout and presentation, syntax, figurative language (that sort of thing). for each one write 2 paragraphs one on the first thext then one on the second. to make it clear that you are comparing start the second paragraph with 'in comparision' or something similar. at the end of the second paragraph for each area do a little summary of the comprision in a few sentences to show a clear comaprision. do this for each area you want to focus on, and at the end includea a conclusion, which i ususally start with 'in conclusion'
for each paragraph make sure you include a example where needed and explain it and always link back to the original question