Turf is instant. Rolls go down, the section looks finished the same afternoon, and it can be walked on lightly within days. It costs more per square metre and it still needs careful watering for the first few weeks while roots knit into the new soil underneath.
Hydroseed — a sprayed slurry of seed, mulch and fertiliser — costs noticeably less and covers awkward or sloped ground well, but it needs two to three weeks of consistent watering before it can be walked on at all, and longer again before it takes normal use.
The deciding factor is usually timeline, not preference. A property going on the market in six weeks needs turf. A section with no deadline and a tighter budget is well served by hydroseed, particularly over a larger area where the per-square-metre saving adds up fast.
Either way, the soil prep underneath doesn’t change. That’s where the job actually lives.