I skipped reading the vamo/provari arguments

but here is my evaluation. (I don't have a provari, but I do have a 1-button knock-off VV. So I won't address provari-specific stuff..)
Evic: High-end cellphone style mod. Relatively durable, but its more an electronic device and less a hammer. Runs under $100 in a kit, has an onboard battery charger, takes 18650s or (with a cheap ego-t tube) 18350s. I like my evic, but I don't run around town with it most of the time. VV/VW with RMS, 5-11 watts (plenty for most users), 3-5V (IIRC). It has a lot of useless features, but some great ones (esp with the new software.)
Vamo: Decent around-town device. Out of the box, it has the most flexibility of anything - ships able to take an 18650, an 18350, or stacked 18350s. Minor issues (board isn't quite as solidly attached as it should be) but easy to fix if it breaks. No onboard charger or fancy settings, just VV/VW with RMS. 15W, some equally large voltage limit (6?) Stacking batteries definitely gives a smoother vape at higher power, since it can behave much more like a mechanical mod.
After going VW, and using that 1-button knockoff, I don't like the provari. (Just my opinion.) It is reportedly built like a tank, which is great, but morse-coding my way into the ohm reader - while potentially flaming out my atty - is just not for me. I just can't justify spending that much money on something that is going to annoy me that frequently, even if it can do double-duty as a hammer. (Since its VV, I'll be spending half my life in the menus reading attys and changing voltage. I switch flavors every 30 mins at least, often more. And a new flavor is a new atty, sometimes similar - 2.2 to 2.4 isn't a big deal - but often not..) That is just me though, lots of people are fans.
That said, if a new provari came out with VW and 3 buttons (and fewer trolls) I'd jump on it.
(ETA: One thing the vamo and provari beat the evic on, hands down, is sunlight. The menus on the evic aren't the best organized, but that is fixable with the upgradable software. Nothing will fix the fact that sunlight makes it completely impossible to read. That is the annoyance that hits me most often.)