Viper atomizer uses oval ceramic base (0 type) while Justfog S14 and Haka Ginx choose round ceramic base (o type). With more room, the cotton in oval type ceramic base absorbs e-liquid more rapidly. While cotton in round type ceramic base, it is pressed too tight that leads pure oil absorption and burnt taste.
 
 

2. Work with different type e-liquid, can use syrupy VG e-liquid, significantly more vapor.

Lots of customers prefer VG e-liquid  because it creates a lot more vapor. Our bottom ceramic OCC coil absorbs e-juice more quickly. With our improved structure OCC coil, you can enjoy strong throat hit with your PG dilute e-liquid or cloud of vapor by VG thick e-liquid. 

3. Different heating wire, made in USA, longer lifespan

4.      Tolerance Control
 
As we know, Justfog is the best of controlling product tolerance in the three clearomizers. Though they use round ceramic base, Justfog S14 coil shows no burnt taste with battery below 4.6V. It is because Justfog do good job in tolerance control. Haka Ginx couldn’t catch Justfog in tolerance control, so it results burnt taste. With top refilling system, it is easy to leak.
As for viper atomizer, they control tolerance better than Haka Ginx, but not good as Justfog. However, they are smart to use oval ceramic base instead. Such structure absorbs e-juice rapidly causing no burnt taste.