This claim is opinionated and inaccurate. Depending on the person and their priorities, one state may be better. The advantages and disadvantages are different from climate to activities. According to the blog LAHomes, different aspects of each place can appeal to you. If you’re thinking about affordability, think of the difference of taxes, economy, real estate, etc. If climate is what appeals to you, California has a diverse climate known for sunnier weather whereas Oregon has four seasons and is known for the rainer weather, and people can prefer one over the other. While the USNews gives the best places on the west coast to live, it lists statistics and information on each city, and does not give any response to the claim, “California is a better place to live than Oregon.”
So, depending on what you’re looking for, neither place is better to live than the other. This statement too opinionated.