I probably will get flamed by saying this but, no offense to anyone, comparing a $30 (on FastTech) - $60 (most U.S. retail) Vamo to a almost $200 Provari is like comparing a Ford Focus to a Mercedes-Benz.
I just think that to say that a Porvari is "better" than a Vamo is pointless and borderline snobbish. They are different beasts that serve different vapers who have very different expectations and derive their vaping pleasure on many different levels and in many different ways. I think the Vamo is a great entry level device to anyone just want to get their feet wet in APV. Unless money is of no concern to a particular person, spending close to $200 on a device as your first ever APV is very risky to most people and it is not a good advice in my opinion.
I see this kind of comparison for just about every product and frankly it's rather annoying. I am into photography and I always see in forums that people say things like don't buy the xyz point-and-shoot, buy the $3000 abc DSLR instead and here are the 10 great reasons why you want a $3000 abc DSLR, blah, blah, blah. How many of you in this forum will spend $3000 USD on a camera even after reading the 10 great reasons? How many of you think that you are somehow missing out on some great photographic moments and enjoyments because you only have a $200 camera? How many of you feel that you are somewhat inferior because you only have a point-and-shoot instead of a DSLR? BTW, a Hasselblad DSLR system can set you back $20,000. Yes, that's right, it's not a typo, there are four 0's after the 2 and it's in US dollars.
Just saying.