Houston is 17% cheaper than St. Petersburg.
When comparing Houston, TX and St. Petersburg, FL, the overall cost of living indices are 88 and 106 respectively (national median = 100). Rent is $229/month cheaper in Houston, saving renters about $2,748/year.
Median household income is $10,224/year higher in St. Petersburg. Home values also differ significantly — the median in Houston is $253,400 compared to $331,500 in St. Petersburg.
Houston vs St. Petersburg — common questions
Other cost of living comparisons for Houston and St. Petersburg