In California, some UCs have low acceptance rates, while others have higher acceptance rates. Moreover, CA has the Cal State system as well.
The difference between UC Berkeley, UCLA and now UCI and UCSD and universities such as UT Austin, UNC, UVA, GTech, and Michigan is that the UCs do not have 70%-80% of their seats reserved for in-state applicants.
Texas also gives the top 6% of graduating students auto-admission to UT Austin, so these students are not competing.
So, in 2021, UT Austin got some 66,000 Applications, and roughly 19,000 were accepted. However, of those 19,000, around 14,250 are in-state students who were auto admitted. So there were roughly 4,750 who were not auto admitted, and they were selected from 51,750.
So for OOS applicants and in-state applicants who were not in the top 6% of their class, which is a 9.2% acceptance rate.
For a OOS applicants, UT Austin, Michigan, UVA, W&M, UNC, and GTech are about as competitive as Berkeley or UCLA. However, UCLA and Berkeley are unique in that they are just that competitive for in-state applicants as well.
One should remember, however, that CA has 430,000 high school students graduating each year, while #2, Texas, has some 360,000.