IMO this is a misstated function of VW devices. Yes they will adjust some with the resistance but you still have to dial it in just like a VV device. Also with the cheaper mods you have cheaper electronics so you have less accuracy. So you have to do more dialing in.
So if you think you can get a VW mod set it on 9W and then put on a LR 1.5 ohm atty then switch to a SR 3.0 ohm and your not going to have to adjust the power you will be disappointed.
So for me I dont see much difference in a VW over a VV
I pretty much set and forget all if my devices then fiddle with all of them. Except for my dripping attys, everything is roughly the same resistance, but my taste isn't. For some reason I like my ADV cooler in the morning and warmer in the evening. No matter what device it's on I press a button until it taste the way I like it. I have no clue what volts or power it's set to, I can't find my glasses. The only times I pay attention to resistance is when I'm ordering cartos and attys, and when I put a new one on a battery I check the ohms to make sure I got what I ordered.