@MiamiMom63: Both the gift box and cardboard box version of the Protank, are genuine. They simply made the cardboard box version to make shipping cheaper. At least that's the reason I read here and there...
As for Vivi Nova vs. Protank: They're both really good clearomizers imo. I started out using Vivi Novas (both regular size and Mini), but these days, I'm exclusively using Protanks.
The Vivi Novas always "just worked" for me, no leaks, no condensation on battery connector, just a great vape, as long as you remember to do the tilt'n'whirl to keep the wicks wet (as it is of course a top coil clearomizer) - forget to do this, and you'll get dry hits. Vivi Nova is great, if you like a warmer vape.
I started out being disappointed by the Protank actually. I found the draw way too airy and also, the Protank way too loud. But decided to give it a thorough testing, and after a good week of exclusive use, I was sold. I started to actually love the airy draw (and found the Novas draw way too tight now) and I figured out, that by unscrewing the top cap on my eVic to make a real flush fit with the Protank, a lot of the loudness I hated, disappeared. You don't have to do the tilt'n'whirl, as it's bottom coil. Yes, it will leave a drop of condensation/liquid on the battery connector, but just wipe it off with a q-tip and you're good to go.
Only real downside of the Protank, is that in the winter time, if you go from a cold to a warm environment (outdoors to indoors), it can flood the coil. Just something to remember.
Protank is great, if you love a cool vape.
My recommendation, as many others have probably already said, is to get both and find your favorite as both of them are great clearos.