I have no idea, I only own the ulton. I doubt anyone here owns both. Maybe have a look around on the vape forums to see if anyone has posted a comparison. The ulton works out cheaper if you want all three airdisks (which I'm assuming you do since you like a very tight draw). The o-ring I use for the airdisk has an outer diameter of 16mm and an inner diameter of 14mm. From what I've read on the product page for the ulton version, apparently ulton has replaced the o-ring that the chimney sits on, so you shouldn't have an issue with that one.