The thesis statement:
Company X and Company Y are quite different in the areas of salary, working environment, and opportunity for promotion.
Body paragraph 1: salary
A.salary in Company X
B.salary in Company Y
Body paragraph 2: working environment
A.working environment in Company X
B.working environment in Company Y
Body paragraph 3: opportunity for promotion
A.opportunity for promotion in Company X
B.opportunity for promotion in Company Y