Shouldn't ever be any need for power tools in cleaning a modern firearm shot with modern ammo.
The tornado brushes are just soft stainless steel wire, still a lot softer than your barrel, and wound in a specific way. I don't have any use for them but they might be a little more aggressive on heavy fouling.
I clean pistols every 500-1,000 rounds whether they need it or not. That involves wiping out all the sooty goop out of the action and running patches down the bore. I usually also run a bronze brush down the bore a handful of times as well, just to knock loose any carbon bits or stray lead that might have accumulated. (I only shoot lead through my pistols 97% of the time. Copper jacketed ammo should require LESS cleaning than this.) Then a wet patch and a dry patch or two and give it a visual check held up to a light. If I can see what appears to be a clean bore with nice sharp rifling clearly visible and no streaks or deposits, it's clean enough.
Endless patches and scrubbing trying to get a patch to come out white is far more effort than I've ever seen any practical benefit from. I can clean the bore of any of my handguns to my satisfaction in 5 minutes or less every time...usually 2 minutes or less.
I'm much more concerned about getting the black gunk out of the action where it might actually cause a problem, than I am about getting the bore spotless.