I will not lie, i will say that all i know is a 306 is about the same size as a 808 cart, has it's own drip tip (which is ugly as anything), must be kept wet, for unlike the 510 - one slight dry pull and the atty is dead.
I have taken the jump into dripping and personally i think you will like it. Last night i thought i would try the tank, ce2/4, and a clearo (v510/phoenix) and i found that not only was the taste so muted but i was gagging. I wish you the best of luck in dripiing and hope you like it.
I am not going to recommend anything atty wise as i find it is like taste, and is highly subjective. (that and i find the less expensive works by far better then the higher over priced)