Tucson is 28% cheaper than St. Petersburg.
When comparing Tucson, AZ and St. Petersburg, FL, the overall cost of living indices are 76 and 106 respectively (national median = 100). Rent is $463/month cheaper in Tucson, saving renters about $5,556/year.
Median household income is $18,572/year higher in St. Petersburg. Home values also differ significantly — the median in Tucson is $242,200 compared to $331,500 in St. Petersburg.
Florida has no state income tax, giving St. Petersburg residents a significant tax advantage over Arizona's 2.5% rate.
Tucson vs St. Petersburg — common questions
Other cost of living comparisons for Tucson and St. Petersburg