Both pressurises the air. But the difference lies in the flow of air and increase in pressure.
> For Blowers the specific ratio is upto 1.2 only but it can handle a huge volume of air. Where as in the case of compressor the specific ratio is more than 1.2 and flow rate is comparatively lesser than blower
> Blower is an equipment which capable of blowing air/gas. Its generally a scroll fan either forwward curved or backward curved with an enclosure. Even an axial flow fan can be turmed as a blower. Blowers delivers a large volume of gas with lower pressure. Blowers having pressure between 0.7-3bar
> A compressor is a mechnical device that inceases the pressure of a gas by reducing its volume. Compressors deliver gas with a high pressure to volume ratio. Compressor have pressure above 3 bar.
> An air compressor operates at a high pressure to volume ratio, while an air blower tends tooperate at a low-pressure ratio. A compressor crams air into small space which makes the air denser.