I would like to know which of the two last longer. I have been vaping for a little over a week (ciggy free) and have only used a clearomizer. You just fill up with juice and go. I currently have an ego battery and watched a video on how to fill an ego cartomizer and It looks a little involved. He was popping off 2 pieces at the mouthpiece and said you can discard one piece if you want. Poking holes through the mouthpiece to squirt the juice in with a syringe. Can all that poly fill melt or burn if you dont keep it juiced up enough? The cartomizers are less expensive though. What advantages other than price does the carto offer?