I'm using the nickel air core (has two nickel coils and 4 air holes in the bottom of the coil) and honestly don't really notice much difference in the air flow between the TFV4 and the Freemax Starre Pro. The vapor production is better and noticeable. By comparison, it falls halfway between the vapor production of the Freemax Starre Pro and my Velocity clone.This tank has amazing airflow...........