I tried out the Atlantis 2 .3 ohm coil on the Atlantis 1 and didn't care for it. It throws the balance off because of the bigger juice openings and bigger airflow at bottom of the coil but no increased airflow settings on the Atlantis 1 like the Atlantis 2 has to match this coil. The vape was also too hot for me with less flavor, just not my kind of vape. As far as I'm concerned the Atlantis 1 and matching Atlantis 1 coils is a perfect match in every way. I vape the .5 ohm coil at 35 watts and nothing has matched it for flavor with very respectable vapor production. I'll have to try the Atlantis 2 .5 ohm coil but I have a feeling the balance might still be off for the same reasons. IMO the .3 ohm Atlantis 2 coil is definitely not for the Atlantis 1 as it's not designed to handle the extra heat at high wattages. It just doesn't have nearly enough air flow to do so. Hell you have to give that .3 ohm coil 70 watts just to wake it up. You want to use the .3 ohm coil, get the Atlantis 2. My two cents and as everyone knows, taste buds vary and I can only speak for mine.