I have the ERA and the Hornet and received my Cyclone yesterday. From what i understand, the Cyclone has upgraded insulators and a slightly curved deck, which I guess passes for a juice well. The only other difference I can see is it is a pop on cap instead of the screw cap on the ERA and Hornet, which means you cant use the Cyclone cap on the other two attys. Size and layout are identical but damn, this Cyclone is good looking. Stuck a coil on it yesterday and its basically the same procedure as on the ERA. The best thing about the Cyclone though is you can get the Airflow Control Cap. Allows you to adjust the air holes by simply twisting the cap or drip tip. Easier to use than the cap on the Trident. Based on what I see, I would say if it wasn't for that cap, the ERA/Hornet and Cyclone are almost exactly the same, performance wise.
Hope this helps.