This is clearly something that can be answered with 100% certainty. But based on your own personal experiences or what you’ve heard, what would you say is important to the different UCs when they review apps? For instance, UCB is known to take a more holistic approach. Some believe that UCLA values a wide array of leadership, etc.
correction: can not* be answered with 100% certainty. oops.
In my opinion, those “beliefs” are urban legends with no basis in shared reality, and the UCs do not have reliable differences in “primary focus” (well, more accurately, they all share the same primary focus: GPA/test scores).