Boston is 4% more expensive than Downey.
When comparing Boston, MA and Downey, CA, the overall cost of living indices are 176 and 169 respectively (national median = 100). Rent is $201/month cheaper in Downey, saving renters about $2,412/year.
Median household income is $7,355/year higher in Boston. Home values also differ significantly — the median in Boston is $710,400 compared to $728,500 in Downey.
Massachusetts has a lower income tax rate, making Boston slightly more tax-friendly.
Boston vs Downey — common questions
Other cost of living comparisons for Boston and Downey