Okay so I've been smoking a 510 for around a month now and looking to upgrade my PV to something more spectacular. Been looking at clearomizers and these two have stood out among a couple others as being quality stuff. Now the kanger is a bottom feed and the Vivi is a top feed. What's the difference in how these two work and how does the vapor differ between the two? Also some tips on maintenance and general tips would be appreciated. Planning to buy 2 ego twist bats, a 2 amp 5 volt adapter, an ego specific usb cable, and a couple of clearomizers. Possibly a VV passthrough too. Anything else y'all would recommend?