For me, it's the Stingray X. I can't speak for the Original as I have a clone version, with a single 18650 tube(there are versions that have 18650, 18500 & 18350 tube sets, the single tube has lower volt drop & IMO is better) but this is the best mech mod I have owned or used. Reasons: 1. Copper inner tube & switch contacts for minimal volt drop. 2. Stainless Steel outer tube for durability. 3. SS outer tube also good for not getting smelly hands like copper or brass mods will cause. 4. Hybrid mode adapter included in the box. 5. Drip Tip is very comfortable on the lips. 6. All threads are nice, no crunchy threads. 7. Almost the shortest 18650 mech mod, few are shorter & then only by 1 or 2 mm. 8. The switch (after addition of a 3rd magnet) has a perfect short throw & never misfires. 9. It looks & feels good. The one problem with the Stingray X clone I got was the switch was too soft, the magnets used are not strong enough & it would auto-fire if the locking ring wasn't engaged, with a heavy atty on top of it. That is obviously not ideal & can cause battery problems like venting & overheating. To fix that problem I first looked for magnets of the same size & came up with nothing, so instead I bought a spare switch replacement. I then took 1 of the magnets out of the new switch & placed it into the old switch, so instead of 2 there are now 3 magnets, 2 one side 1 the other. This made the throw shorter (approx 2mm) & give it the right amount of needed strength, so that it can sit without the locking ring engaged on a table with the heaviest of atties attached & never autofire.