This whole section of Hebrews could be called a study in comparisions. Each chapter is filled with comparisions. Everyday life is filled with comparisions.
Advertisers use comparision to sell their products by comparing one brand or model with another.
The one is good, but theirs is better. Comparision functions in many ways. Comparision can produce jealousy or it can be used to motivate. Such as the humorous story of the rooster who found an ostrich egg. Comparision can be used to give clarity and understanding.