I have both the DCTank and Mom and Pops (Submarine 5ml)
tank. The DCTank is bigger and the Sub tank seems more user freindly for smaller cartos. I like them both.
You need a syringe to refill the Sub tank, which is fine. But with the DCTank being able to hold more
juice, and all I have right now are these Smoketech cartos that fit the DCT. I find myseld using the DCT a lot more....for now.