The key difference between resin and plastic is that the resins are more of a natural origin since we produce them directly from the plant oozes whereas the plastics are of synthetic polymeric nature.

Resin and plastic are of an organic nature, which mainly consist of long hydrocarbon chains. Due to the presence of repetitive units, both have polymer characteristics. However, while resins are more of a natural form, plastics are generally synthetic or semi-synthetic in nature.