Rear Exhaust Fan

I want to install a 140mm rear fan, i have a NZXT H7 flow case and i was looking at a NZXT 140mm fan I found the NZXT F140P V2 and F140Q V2. the main differences in specs seem to be airflow and pressure The F140P specialises in Static Pressure, has airflow rated at 93.2 CFM and air pressure...