The best way i have ever heard it described was on a rip trippers video where he said that ohms are just like a highway and the electricity are like the cars. The lower the ohms(resistance of electricity) the bigger the highway for cars(electricity) to travel down. So the 2 ohm coil would be like a 2 lane highway and a 1 ohm coil would be like a 4 lane highway and a 0.2 ohm coil would be like a 8 lane super highway. Thus a 1 ohm coil will heat up the same as a 2ohm with the same wattage because like he said the device adjusts the voltage according to the ohms of the atomizer,but on the same voltage the 1 ohm will heat up faster, provide a hotter vape, and given the airflow conditions/juice flow conditions are right provide more vapor. Im not saying that it is an all around better vape, because everyone is different. Tanks and RDA's (rebuildable dripping atomizer) are two completely different vapes in my opionion. Tanks (Nautilus, Aerotank, Genietank) and RBA's (rebuildable atomizer) ( kayfun, russian 91%, genesis RBA's) are a much closer comparison. If you like the kanger tanks and want to try rebuilding and tinkering with different coils and wicks, go for a kayfun lite and try it out. It all depends of budget and how much time your willing to spend on it.