Quick answer for Central Florida
Sod is usually better when the yard needs fast coverage, erosion control, HOA compliance, or a predictable finished look. Seed can make sense for large lower-visibility areas where budget matters more than speed and the homeowner can manage watering and weeds over time.
Why Florida changes the decision
Heat, sandy soil, rainy-season washout, and weed pressure make seed less predictable than it looks on paper. Sod costs more upfront, but it gives instant coverage and reduces the time bare soil is exposed.