Both machines use the same motor, impeller, and basic frame. The C|Flux has a 1 micron filter; the P|Flux has a HEPA filter. The C|Flux uses a plastic bag for fine dust that is cleaned from the filter; the P|Flux uses a metal catch receptacle with a 4” cleanout port and a sight window. The C|Flux has a quick release collection drum; the P|Flux has a quick release “Smart-Drum” with a dust level sensor and LED light for viewing through the drum window. The P|Flux has additional frame supports, filter doors, and sound dampening material around the filter. The C|Flux has manual filter cleaning; the P|Flux has automatic filter cleaning.