Problem: How does the sentence end?

Ryan was more flexible than Michael, so
Answer: Michael had a more difficult time doing the Yoga pose.

Problem: How does the sentence end?

Erin helped Victoria repair the car since
Answer: Erin does such a great job at repairing things.

Problem: How does the sentence end?

Aaron had issues with chin acne unlike Jason so
Answer: Jason felt very self confident about it.

Problem: How does the sentence end?

Justin played with the bones while Kevin shied away since
Answer:
Justin was interested in archaeology.