Lived in both. Utah is the theocratic Bible Belt the South can only dream of.
That said, Utah--particularly the Salt Lake City area--isn't as bad as you'd expect if you're not Mormon. Yes , the influence is there, but there's a surprising number of fun things to do that have nothing to do with them, even some really good craft breweries (whose beer is exempt from the state's weird alcohol content limits). I'd much sooner go back to Utah than any Southern state.