yes. i don't see how this makes vv and vw the same thing however...
Ohms law 101:
Watts = voltage*voltage/ohms.
Given a specific resistance head, if I vary voltage, I mathematically vary my wattage.
VV and VW devices BOTH adjust voltage to the device to get to a desired wattage.
In a variable voltage device, I am setting this voltage manually. I hope to achieve the desired wattage either by way of "chart" , "rule of thumb (set voltage to ohms +2 to get 8 watts), or mathematically
In a Variable wattage device I set the target wattage, the device reads the coil resistance and adjusts the voltage accordingly. The only difference is whos brain am I using. With variable voltage I'm reading the coil resistance and I'm adjusting the voltage. With a Variable Wattage device I let the device do it.
Irregardless of who's "pushing the buttons" the exact same thing is happening on a VV device as is happening on a VW device.
I suppose you're going to say that a stick shift and automatic transmission are fundamentally different too? I guess stick shifts are hopelessly outdated too.