1. Different uses: Modified cars (such as special-purpose vehicles and commercial vehicles) are mainly used for market operation and public services, and they are a kind of tool products; Car modification is a kind of consumption behavior, just like house decoration, which belongs to the satisfaction of personality preference.

second, different attributes: modified cars are a kind of means of production, belonging to the category of industrial products and manufacturing industries; Automobile modification belongs to the category of consumer goods, which is an optimization behavior of living materials.

third, the concept is different: the modified car is suitable for the concept of manufacturing, which is to manufacture a special-purpose car; The car modification is applicable to innovative ideas, which are local optimization and adjustment on the basis of mass production of cars.

fourth, the position of industrial chain is different: the modified car is located at the front end of the industry, which implements announcement management and has legal access standards; Automobile modification is located in the after-sales link of automobile, which is a special service demand.

5. Different technical methods: refitting cars is mainly based on adding special body and special equipment; The main technical means of automobile modification are adjustment, replacement and technical upgrading.