I've been trying the Gio and Nova side by side. The Nova has the 510 thread with variable heat. The Gio has no button, custom tanks and no variable heating. You'd think the Nova with variable heating would be smoother, but even at the lowest heat it sends me into coughing fits. It also has less taste. The Gio on the other hand, is always smooth and produces more flavor. Anyone else has the same experience?