I was trying to figure out why the draws on the Darwin seemed a little more satisfying than the ProVari using same settings/juice/atty. Nuck helped me pin down the difference.... Airflow! The Darwin has a tighter draw providing fuller vapor while the ProVari adds a little more air making the hits less full.
For the last 3 days I have switched back to the Darwin. Mainly for 2 reasons. First, batteries. It's very nice not having to carry an extra battery around in my pocket. I know that I can vape the Darwin all day and have plenty of battery life at the end of the day.
Second. Airflow!. There really is a noticable difference in how the Darwin Vapes. The Provari is much more of an airy draw than the Darwin. I have used 510's, 901's and 306's. I don't much care for 801's. I am enjoying the less airy draw from the Darwin much more than the airy draw from the Provari.
If the Darwin just looked and little different :
Does anyone have any idea's on how to get a less "airy" draw on the Provari?