I use the BVC coils that are configured to work in the Bridge but I think they're just nautilus BVC coils with a housing to fit the bridge. I could be wrong.I was actually very surprised at how well the humble BVC (which I've ignored since its inception) performs!
I always opted for the nautilus coils, because of my Kabuki.
With the Kabuki, Zen (extremely reliable source of info/knowledge) had done very thorough testing on all of the pop-in coils on the market.
What he found was that the Nautilus coil performed best across the board, aka on average, and so he built Kabuki around it.
Enter my first Billet Box (Rev-3a, 2014), and I just HAD to have a Nautilus Bridge.
Then, my 2nd BBox arrives a week later, with a BVC Bridge. I was hesitant to use it, but I'm glad I did!
All my other devices except the sub ohm ones I use nautilus coils in. I use the BVC coils in the tanks that were for the regular nautilus coils too.