The answer to 'which is better sod installation or' is that sod installation is generally better than seeding for establishing a new lawn quickly. Sod provides an instant, mature lawn that is ready for use right away, while seeding takes several weeks to months to grow in and establish.
The main benefits of sod installation include faster lawn establishment, better weed control, and a more uniform appearance. Sod also helps prevent soil erosion and can be installed year-round, unlike seeding which is best done in the spring or fall. However, sod is typically more expensive upfront and requires more initial maintenance than seeding.