I bet you will see a little less deep sub bass, and more higher sub bass above a certain point. Basically the more you let the driver vent, the louder and higher up the bass boost gets, and the more sub bass gets leeched out.

Audezes can get a slight bass boost if you use dense velour pads. The bass cut is so low that you don't lose any usable sub bass, and the boost is so wide and smooth that it creates a decent slope. They ought to default to velour pads IMO!