McKinney is 18% cheaper than Downey.
When comparing McKinney, TX and Downey, CA, the overall cost of living indices are 138 and 169 respectively (national median = 100). Rent is $51/month cheaper in McKinney, saving renters about $612/year.
Median household income is $32,873/year higher in McKinney. Home values also differ significantly — the median in McKinney is $439,500 compared to $728,500 in Downey.
Texas has no state income tax, giving McKinney residents a significant tax advantage over California's 13.3% rate.
McKinney vs Downey — common questions
Other cost of living comparisons for McKinney and Downey