Kansas City is 25% cheaper than St. Petersburg.
When comparing Kansas City, MO and St. Petersburg, FL, the overall cost of living indices are 80 and 106 respectively (national median = 100). Rent is $356/month cheaper in Kansas City, saving renters about $4,272/year.
Median household income is $5,669/year higher in St. Petersburg. Home values also differ significantly — the median in Kansas City is $227,000 compared to $331,500 in St. Petersburg.
Florida has no state income tax, giving St. Petersburg residents a significant tax advantage over Missouri's 4.95% rate.
Kansas City vs St. Petersburg — common questions
Other cost of living comparisons for Kansas City and St. Petersburg