It has been proven conclusively that the Vamo (and other cheap chinese mods as well) do not deliver a steady voltage like the Provari does.
They use pulse width modulation to arrive at an average, instead of delivering a nice flat line like the Provari does. This has been shown numerous times on an oscilloscope.
YOu might not be able to taste the difference but alot of us can.
So no, alot of those mods cant do what a Provari does at all.
...that issue had to do with the old 33.5Mhz Vamo V5 and earlier chips.. not a problem with the later chips. No reattlesnakes here.