The only answer I can give you is only you can decide if it's worth it to you. The
vaping experience will not be significantly different in my opinion, although you will get those that respond that the Vamo is Pulse width modulation and you get a rattlesnake effect from it and get an inferior vape. For me, the
vaping experience is similar, if not the same.
Where the true difference lies is in the build quality. The Provari is very well made and will probably not let you down no matter how you treat it. Even if it breaks, it has a warranty, and if it's out of warranty, Provape will repair it for very reasonable rates.
I see the Vamo as almost a disposable
device (I have 2, both are passed a year old and still working but others have had issues with them from day 1) and when it breaks, be prepared to replace it as repair will more than likely cost more than the device is worth.
I see the Provari as a high quality device that I know won't let me down.
Is it worth the extra $100+ bucks over the price of a Vamo? Only you can decide.
Finally, if you can visit a local B&M that carry the Provari, go take a look - hold one, vape one and see if it's for you. Few that I have seen ever regret buying one.