Answer:

What are the compound sentence that show comparison?

A simple sentence contains one independent clause. A compound sentence contains more than one! Put another way: a simple sentence contains a subject and a predicate, but a compound sentence contains more than one subject and more than one predicate.

How about sentence showing contrast?

To show the contrast between two ideas we can use the following sentence connectors. His rope was thin but it was strong. He is fat but he runs fast. Although the boy was injured, he didn't give up.