Problem: How does the sentence end?

Frowning was something that Brian did a lot of compared to Brett, because 
Answer: Brett was a happy person.

Problem: How does the sentence end?

Justin wrote a paragraph in his planner every day unlike Matthew because 
Answer: Matthew was disorganized.

Problem: How does the sentence end?

Nick always met their responsibilities while Steven would avoid them for the reason that 
Answer: Nick was very mature.

Problem: How does the sentence end?

Robert has a clear view of his future, but Hunter is still trying and that is because 
Answer:
Robert has a clear mind.