Nothing compares to that monthly AC/heating bill.
And that's before the fact gas and electricity is routinely 2x more expensive in CA than TX, which energy costs are a large part of the costs of operating a car. If we were to really compare car ownership costs in CA vs TX to the idea of how much I spend on AC, it wouldn't even be close.
Texas's electricity rates are about half of those in California, so 3 summer months' AC costs in Dallas could be notably less, especially for a small/single-person residence.
(And, Calfornia's gas costs about 40% more per gallon than in Texas, due to both taxes & other supply-limiting regulations - which one might reasonably consider an extra tax on having a car in California.)