Block pattern is also known as "subject-by-subject comparison". According to this pattern, you will be required to separate the body of your compare and contrast essay in two parts.
If you want to write a successful compare/contrast essay, you'll need to avoid writing about really obvious differences and similarities. For example:
Comparison and Contrast of 19th Century Art Essay.
To write a compare/contrast essay, you’ll need to make NEW connections and/or express NEW differences between two things. The key word here…is NEW!