If the author had used a compare and contrast approach instead of a chronological structure, the most likely outcome would be:
We may not have had a clear vision of Jason's overall journey.
This is because a chronological structure typically allows for a clear progression of events, helping readers understand the development of the character and the unfolding of the story. A compare and contrast approach might focus more on similarities and differences, which could lead to a disjointed narrative and make it difficult to track Jason's personal growth and experiences over time.