Boge hands down, no contest. The Smoketech 1.7ohm is good because it's 1.7ohms. If Boge would wise up and make a 1.7ohm XL carto, they'd eat Smoketech's lunch. Boges are more reliable, durable and consistent in manufacturing quality and resistance. I've never had a DOA Boge. I've had Smoketechs tubes come off the base and I've had them last 2 or 3 days. I've had Boges last 2 or 3 weeks or more, even with 100%VG. I've never had a Boge last less than a week like a Smoketech.