Roseville and Downey have a similar cost of living.
When comparing Roseville, CA and Downey, CA, the overall cost of living indices are 168 and 169 respectively (national median = 100). Rent is $207/month cheaper in Downey, saving renters about $2,484/year.
Median household income is $29,954/year higher in Roseville. Home values also differ significantly — the median in Roseville is $630,600 compared to $728,500 in Downey.
Both cities share the same state tax structure since they are in California.
Roseville vs Downey — common questions
Other cost of living comparisons for Roseville and Downey