I've used both over the years and can't see any clear winner.
so im getting a new case [apevia x-dreamer4-bl] and was thinking of what kind of ventilation i should choose. im aware the positive and negative aspects of both but im still uncertian. i have an image that has info on fans, cfm, airflow, ect. here. take a look at that and say what you think. the setup of the fans is uncertian simply because the huge gap in CFM for intake and exhaust for both setups due to the 200mm fan. Im also going to be getting a new PSU with a 120mm fan but i have not yet added that to the diagram.