I think over all I would give the nod to the Billow V2. The Bellus has a slightly smaller build deck and can be a little more challenging. My first couple of builds leaked a bit. Then I my next build, I just packed the juice channels all the way to the base of the deck with cotton. No leaking since that. When it's right it may be just a tad better than the Billow, but if I only could have 1 it would probably be the Billow. I tend to use my Billows a touch more for what it's worth.I see the Bellus has a plug so you can run single coils also. That's nice. Does it work well.
I've packed in as much as 11 wraps of Ni200 into the Billow V2 (that was a little tight but I needed to because of Ni200's ultra low resistance). Seven wraps (spaced) is a piece of cake. That's my normal build for 430 SS.
Cheers,
Steve
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