The answer to 'difference between mulch' is that mulch is a protective layer of material placed on top of soil, while wood chips are a specific type of mulch. Mulch can be made from a variety of organic materials like wood, bark, leaves, straw, or even rubber, while wood chips are produced from shredded or chipped tree branches and trunks.
The main benefits of using mulch include retaining soil moisture, suppressing weed growth, insulating plant roots, and improving soil fertility as the mulch decomposes over time. Wood chips in particular are a popular choice for landscaping because they are inexpensive, readily available, and provide a natural, earthy look. However, wood chips can be more difficult to work with than other mulch types and may need to be replenished more frequently.