Ok, somebody help me out here. What are the advantages of tanks over clearomizers? To expand - I'm using T3S clearos - and from what I can gather it uses an almost identical coil to the Protank 1 & 2. I think PT3 has a dual coil - which is about to be available in T3SD line. So... what do tanks have or do better than clearos that warrants nearly 5 times the cost?