A garden rake is typically used for gathering leaves, grass clippings, and other debris from the garden surface. It has a row of tines that are usually flat or curved.
On the other hand, a garden scarifier is used for loosening and aerating the soil by removing thatch, moss, and weeds from the lawn's surface. It usually has sharp blades or tines that penetrate the soil to help improve its health and promote better growth of grass.
In summary, a garden rake is primarily for gathering debris, while a garden scarifier is for soil aeration and maintenance.