I have noticed that the little compressors seem to go to a very high pressure like 200 psi. they have no tank so increase in storage is not the reason. Is it just marketing hype? The higher pressure means the pump produces less volume at usable pressure because the diameter of the cylinder must be reduced so the motor can handle the higher max pressure. I did buy one once because I needed the 200PSI to test an evaporator.
Bill D
My stationary compressor I reduced from 175 to 120 PSi for noise reduction. I did not increase RPM, but I could have. I can live with the slight storage reduction.