To clarify Mike's post, HIGHer ohms will give you less vapor and less nic per puff.
LOW (sub) ohms will give you more vapor and more nic generally and use considerably more juice.
The big difference is how you hit each vape, low ohms work best with loads of airflow and deep lung hits, where as higher ohms are good for slow mouth to lung drags more akin to smoking.
Both methods have their merits, and as long as your not on the stinkies, who cares how you're vaping.
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