"Plastic" bodies, as used on most modern RTR cars are injection molded and produced in runs of thousands. Detail has improved radically over the years but the demands of mass production usually mean that the molds lack super fine detail - though it may take a sharp eye to be critical of some newer stuff.
"Resin" bodies are typically produced in smaller quantities, often a few dozen or a few hundred. The molds and bodies are usually handcrafted. Detail can range from mediocre to unbelievable depending on the maker.
Plastic will always be cheaper because of the economies inherent in large production runs.
Resin is often the only way to get bodies that the major manufacturers won't do because they don't see a large enough potential market to justify the tooling.
"Resin" bodies are typically produced in smaller quantities, often a few dozen or a few hundred. The molds and bodies are usually handcrafted. Detail can range from mediocre to unbelievable depending on the maker.
Plastic will always be cheaper because of the economies inherent in large production runs.
Resin is often the only way to get bodies that the major manufacturers won't do because they don't see a large enough potential market to justify the tooling.