My favorite of the whole series is the original Falcon tank with the M-triple coils. From what I've read, the Falcon 2 isn't a whole lot better and there's only a few coils for it. The Falcon King has a latch lid, and 810 drip tip vs a screw on cap and 510 drip tip. I think the drip tips on the original Falcons are the best 510 drip tips I've ever got with a tank. I really like them. The drip tips that come with the resin versions aren't as nice. They can all use the same coils except the Falcon 2.