I've been finding the same Cass........I have 4 blue, which have the hardest draw.....2 green which are the easiest draw.....And 3 orange which are in the middle........And as time goes on, the difference seems to become more pronounced ..........
Strange. My blues seem the easiest. Or maybe, for me they're the most comfortable draw. Pinks are a little "loose." Orange (at this time) is "okay." And my green seems hard, but I think it might've just needed a full charge.
One thing that definitely makes a difference is new carts. Pre-filled seem to be the best. Nice and fresh out of the pack, they
vape the best. Draw the best. I re-fill til I think they're done...and look forward to a fresh one. I definitely notice a difference there.