The HorizonTech Falcon 2 and Falcon King are both renowned sub-ohm tanks, but they have some differences: Coil Compatibility: The Falcon 2 uses the Falcon 2 coil series, while the Falcon King uses the original Falcon coils. Capacity: The Falcon King generally has a larger e-liquid capacity than the Falcon 2. Airflow: The airflow systems may differ between the two tanks, affecting the vaping experience. Design: The overall design and aesthetics can vary between the Falcon 2 and Falcon King.