If you are using a high pressure pump then the MCW6000 will likely perform better than the MCW6002. Also note that the performance curves of the MCW6000 and 6002 lie atop one another at flow rates of 1.25GPM and below. This means that, if you are using a low pressure pump such as a Eheim 1046 or 1048, the MCW6002 will probably perform better than the MCW6000 because resistance is lower and so final flow rate will be higher.



Link: Procooling