E.g. this seems pretty methodical and finds 13.5% for CA and 8.6% for TX. https://taxfoundation.org/data/all/state/tax-burden-by-state...
What data is backing up those numbers? Does that include sales tax, gas tax, utility tax, car registration fees, and every other form of state tax?
Washington state also added a yearly EV registration fee. Their argument is the gas tax pays for road maintenance, but EVs don't consume gas, so they need some other way of extracting money from those owners.
In California, Prop 13 makes real estate tax effectively de minimis (especially if you bought a long time ago), and the higher income tax rates make up for that.
Texas rates are higher and there's no limitation on their growth.
This difference is obscured if you're a renter.
Essentially, California has a more progressive tax system than Texas.