This is hard to quantify. People vape different juices in different amounts. Think about used cars. Their value is quantified by miles driven and repairs done. Only a little bit by year made. What I’ve found so far in my very limited experience is that a coil cartridge seems to last about 2.5x what a wick does vaping the same juice at the same rate. I’ve been vaping a zenith lately, and while some people claim a month, I’ve been getting a bit under a week.