Smoktech cartomizers use a less dense filler material; they are easier to load with juice, but may flood more easily. Boge uses a more dense filler; they are harder to load with juice, but may be less likely to flood. They also might be tougher to wick adequately, so dry hits might occur. So depending upon the brand you are using you likely will experience different results.
Individual vaping techniques can play a role. Vapors who have a heavy draw tend to pull too much liquid into the carto which can lead flooding. A gentler, consistant, smooth draw of 3-6 seconds is generally what I have found to work best with a cartotank. If you watch PBusardo when he vapes on a tank, he frequently takes what I call "pipe puffs". You probably have seen tobacco pipe smokers who just do short in and out puffs, which I believe helps prime the juice delivery from the tank to the carto. Take notice when you watch Phil do this.
Individual vaping techniques can play a role. Vapors who have a heavy draw tend to pull too much liquid into the carto which can lead flooding. A gentler, consistant, smooth draw of 3-6 seconds is generally what I have found to work best with a cartotank. If you watch PBusardo when he vapes on a tank, he frequently takes what I call "pipe puffs". You probably have seen tobacco pipe smokers who just do short in and out puffs, which I believe helps prime the juice delivery from the tank to the carto. Take notice when you watch Phil do this.