Honestly, that is the one thing I haven't tried is a standard 510 carto, its about the only phase I didn't get to. I am a pretty heavy vaper and I find that when I drip fill them they can hold about 50-55 drops which would last me a few hours. I have recently been bottom/condom filling them because its just quicker and I get about an hour or so out of them. But again, I am definitely a chain vapor every few minutes I take a few puffs.
I have gone through 510 SR/LR attys, eGo and 510 tanks, 306 LR and CE2-X and I will stand by the dual coils over anything else. I get great vapor and flavor out of my juice and I'd say the juice lasts about the same as if I were using a 510 LR atty.
I have also found they do last awhile too, I bought 15 of them about 2 weeks ago and have been rotating 5 of them every fill and I have yet to throw one out.