Mine is the slightly larger one, but I'm pretty sure that's the only difference. It's 24mm/3.5ml (vs 22.5/3.2).
$18.44 Kayfun Mini V3 Plus Styled RTA Rebuildable Tank Atomizer - 3.5ml / stainless steel + glass at FastTech - Worldwide Free Shipping
I thought a few others had issues too, but I may have misread. Because of that, I was expecting that at least one of the two would have issues.
There's still time...
This is the Plus I have and was happy, but sadly it's showing Discontinued on FT