Maybe magic electrical energy then.
Seriously, the physics involved explain why the results are the same when heating the same coil with a DC voltage or the same RMS voltage.
No magic, or FM as I call it, involved. Different regulation systems, different peaks and valleys. Both do the same thing, just do it differently and if it's filtered it makes it even more noticeable. Zapped explained it, with one you are cycling between 4-6v to get 5v. With the other it's cycling 4.5-5.5v to get 5v then it's filtered to obtain the .2v you see on the scope.
As for the OP, I have a Lava Tube and a Provari mini, there isn't any comparison! The day I bought the LT I knew it was junk! The threads were loose, the battery cap barely has any threads and feels like it's ready to blow out any second and the "chrome plating" was chipping off on the way home! For $40, I got what I paid for! I can easily tell a difference between the vape on it and the Provari, the LT burns quit a bit hotter, I can't use the same voltage on both using the same atty.
Does it make my vaping experience the "heavenly nirvana" many would have you believe? No. Does it make my juice taste better? No. My carto's don't last longer, my tanks don't stay cleaner and the laser guided targeting system isn't that effective if the truth be told. So no, it's not the end all beat all perfect for everyone device. In fact there are a couple minor things that I don't really like about it! I wish the fire button was placed higher and I wish the battery cap had more grip to it. I find it hard with my large fingers to take it off at times.
BUT,
It is consistent, as everyone says, I've hit it and could tell it wasn't right and before I could say "What the Hell" I finally looked down to see the light flashing rapidly telling me the battery was dead. The menu system isn't nearly as complicated as people would have you believe, I'm an idiot most days and had it mastered in about 20min, yes, it's that easy! It just works! And works! If it doesn't, which it has failed to a couple of times, come to find out it was something I had done wrong! Atty wasn't screwed on tight, threads were dirty etc. Problems you have with all vaping equipment. Then the main reason I bought it after owning an LT, it's built like a tank! I don't cringe when I drop it. I don't worry using it around a welder, I don't concern myself if it falls out of my pocket on the skid steer. Now if I were to loose it, I'd be crushed, but every time that LT hit the floor I was certain it would be the last time it worked!
So is it the best? I don't know, it's the best built and that's what I wanted and needed, so it's the best for my needs. Kiwi seems to really like vw, so it's not the best for her. Some people prefer a bottom feeder, so it's not the best for them. Some people love the simplistic elegance of a mechanical, so it's not the best for them.
Thinking back to the Focus and Bently comparison, neither would work for me, I need to be able to pull a trailer and equipment when needed, I've got to have a truck!