The operating methods of a vacuum pump and an air compressor is a major difference between the two. The efficiency of each can be different as they aim to achieve different needs.
A vacuum pump intakes air from a closed environment resulting in a pump process that is positive discharge with no high pressure, whereas an air compressor intake air from an open environment and compress the air with high pressure.
Both a vacuum pump and an air compressor move a fluid from one location to another, but a vacuum pump uses less power.
