The mini's come with bottom vertical coils(bvc) and taste and vape beautifully in my opinion. The reg size nautilus comes with bdc coils but they are interchanglbe for both tanks. Not sure on the reg size how it runs as I only have a few of the mini's.
I also have been using them along side my rebuildables as mentioned above
They use the same coil...BVC. It is just the size of the tank. They were definitely a step-up from my original Protanks.