Hey all! Still a bit of a noob. Just got my first Joye 510 kit, a coworker gave me one of his empty cartomizers to try instead of the standard atty that comes with it. Wow!! What a difference! Love the warmth you get on the drag! Here's the thing. Can't get hold of him right now and looking to order a few packs for myself. On the site I'm on it gives 2 options for the Kanger horizontal coil cartos. Either (2.1-3.1)ohms or (1.9-2.0)ohms. What's the difference between the two options? Just don't want to get stuck with a bunch of cartos that I don't like.