^ yeah. The J60 and N60 MAFs have different scales, meaning they output different voltages to the ECU for the same amount of airflow. KA guys often use a SAFC to make the correction. I assume the SAFC will work the same way on an RB.
I bet some RB guys running the N60 use better management than the SAFC though. Check out the RB forums to see what theyre running with the N60.