First you can't really use carts at 6volts. They don't flow well enough to keep the atty wet.
Second it won't be any better than your tornado it is just a longer lasting battery. Same voltage so no better. Your not whining just learning.
I agree if one is using the standard media supplied with carts.
I use a Mega 510 atty (holds more juice - about 24 drops)
with my Black Silver Bullet @ 6v using Fluval Foam
to replace the regular polyfill media.
This stuff feeds like a dream.
After using this stuff I rarely drip ever.
Great for car, on the go, where ever you don't want to be constantly
dropping drops.
IME, WAY more convenient.