Both are good your lucky my friend to have not experienced the filler or wick taste the best way to describe is a mouthful of burnt hair taste! Don't worry we all get it sooner or later. I prefer carto tanks. But there's a new version on the market Nhalers atomizer tank. The reactor tank its awesome! but set you back 70 bucks also. If you want a good quality and priced tank check out Mom and Pops Vapor shop. The submarine tank is 12$ if I remember right.