I have the TW Tornado, which I'm pretty happy with. However, I do keep seeing the higher end models being mentioned in the forums, such as the Chuck or the Silver Bullet. But the thing that confuses me is that these models use the same atomizers that lower end e-cigs use. I understand that these devices can provide up to 6 V rather than the 3.7 V. Of course, there is the option of using the low resistance atomizers, but I've yet to find a flavor that tastes better/same as regular attys. At best, they've all tasted bad for me. That's getting off topic, so the question is what makes these devices better other than the voltage?