How many drags are you getting out of them?
I haven't counted, but I'd say ... double? (Not trying to sound like a smart-aleck about it--really.)
Another thing I've noticed is that, for whatever reason, the carts seem to vape drier than with the smaller ones. I've only used them with my passthrough so far, which seems to give a more efficient drag, but one of the things I wondered about before trying the double-sized carts was if the 4081 would have enough pull. It does, at least on the passthrough. And my husband's very happy with them on the NPro, too.