what is thicker 30g or 28g and i want a lot of vapor
28 gauge is thicker. With a spinner, you're probably going to need to keep the resistance up; I believe they (vision spinners) are limited to 2.5 amps. If you try to push the voltage, it will just drop the voltage output to maintain current below the limit. Let's just say you're going to run at 4 volts. A 2.5 amp limit means your builds will have to be kept above 1.6 ohms (at that voltage). In case you don't know, current=voltage/resistance, so you just solve for the unknown quantity.
The other side of the coin is if the limit doesn't work and you try to push the battery too far, it could vent on you. And you don't want that happening next to your face.
If you haven't already, get yourself either an inexpensive multimeter or an atomizer ohm tester. And if you aren't already, familiarize yourself with ohm's law and battery safety.
Rebuildables really are a fantastic thing, but they do need some work on your part to make sure you're doing it right.