I'm quite a noob to vaping, about 4 months so far. All I've used are CE5 clearomisers before quickly moving on to the Evods. There are so many BCC's out now. Protanks I & II, Mini Protanks I & II, Davide's, Mini Davide's, T3's and Evods to name a few. All of these can take the same Kanger heads. So if they all have the same head, is there any difference in performance?