I know the ce2 is a top-mount like the visions extremes and fluxos, and the ce3 and bottom coils like the cyclone vornado (the ego tank that came with the dongle?). The stardust, I'm not sure because the atomizer is half-way down, so it seems like more of a cross between a ce2 and ce3, but I'm guessing it's still a ce2? I see these new x7s being called a ce4? What is that? Also, what kind are the sapphires? CE3s? Because they look different in design.
