I tried both and got the Provari. It's just an all around better made device. If I had a Lavatube that was working well I'd wait till it died. (Not having bottomless pockets) If you're looking for more from VV you need to dig in and experiment with different atomizers,
tanks, cartos, and so forth. These are what make the difference in the end. 4.8 volts is going to taste/vape exactly the same on every VV if you use the same delivery system on them. VV's are simply adjustable power supplies. You'll need to factor
batteries into a Provari purchase as well. (unless you have the convex + terminal type already) You won't be able to use the Lavatube
batteries as they have a concave + terminal. You could muck around with magnets, but why when new batteries are $8-13.
That all said, if money isn't an issue, buy it. You're sure to like it. The Lavatube won't get much use if you do.
FYI. Blue LED's go on sale at Provape midnight, May 31st. (June 1st 12:01AM) A black or chrome Provari with a blue LED is sick!