I'm glad you asked. VW allows the user to control the POWER output of their device, regardless of what resistance the coil may be. This allows the user to find a wattage setting that works good for them no matter which coil they may put on their device. Obviously, this makes for a more convenient setup as the user is then able to control the OUTPUT of their device as opposed to the INPUT. I'm not surprised that people find VW devices to be worse than the Provari (in fact I expect it!). After all, Provari makes an extremely high quality product whereas most VW devices are produced in China to a lower quality standard. This does NOT however take anything away from the fact that VW is inherently more convenient than VV. This is also why I would love for Provari to make a VW device- I know they would do it right.
Well, if you can't TASTE a difference, then what do you care what the power is? That's like saying you want to buy a meter to see how salty your food is, when you can simply shove a bite in your mouth and add more salt.
I'm still not seeing the purpose of VW. Anyway, just yesterday the inventor of the DNA20 chip (or the guy who sells them, not sure) was on this forum defending his product, and he did say that they were working on a newer version. It would be nice to have another American made box device and the DNA20 I've seen are very very cute (and colorful).
So you should get one of those if you love the VW so much. But from the sheer number of people here (ALL of whom have more batteries than just Provari) telling you how amazing the Provari is, maybe you owe it to yourself to find out what you are missing?