IMO, a more apples-to-apples comparison would be a Vamo to a Provari... Though I've never owned, or even handled, a Provari (just way out of my price league) I've got 4 Vamos (one each for self and loving Spouse (though she says not so loving for much longer unless I can soon rein in my
vaping hobby) plus a back-up each) and I've found the Vamos to all be rock-solid in every respect you've given points to the Provari vs the eGo... Just saying...
I think the OP was comparing the ProVari to Egos based on his/her experience, because that's all he has to compare it to. I would agree that a Vamo or other VV mod would be "more comparable", but it doesn't mean it compares any better. I own 4 VAMOS (not because I love them, but because I felt the need for backups due to quality/longevity concerns) and 2 SVDs.
If you're looking for a comparison of the Vamo vs ProVari, here it is; There isn't much of a comparison. I'm not saying that you can't get a great vape from the VAMO, or that it isn't a good value. However, on every single comparison that the OP made, the ProVari is head and shoulders above the Vamo, SVD, or any other "China 33.3htz" mod, even value/price. If I had just bought a ProVari as my first VV mod, I would have maybe....maybe, picked up 1 VAMO and/or SVD.
I was on a mod shopping spree because I was using quantity to compensate for quality. I should have been doing just the opposite. I bought a 2nd Vari, not for a backup, but because I wanted one. For the same $$$ as those 6 mods that I no longer use, my 2 ProVaris would have been bought and paid for and I'd have a heck of a lot less stuff hanging around, collecting dust.
I'd recommend that anyone looking at a VV mod to at least consider the ProVari. I'm not saying its for everyone, but at least in my case, it would have saved me some money and I would have felt satisfied a lot sooner.