Picks up desk and face palms with it...
Oye, starting the newbie off with 20 gauge wire, lord help me please.
Ok, first thing to do is learn oHm's law, up one side and down the other before building anything, you'll find out some pretty interesting finds along the way as to why 20 gauge is not a great idea (I'll give you this one, its pulling a massive amp draw on your battery), let me clarify that...not a great idea until your well versed in RDA's
Yes, everyone has their "Ideal" set-up, both the atomizers you've got are good atomizers to keep around. They both can regulate the airflow to finite amount which is good, both have great posts for various builds and both are quality products through and through (also they are newbe friendly).
I agree with the regulated mod but depending on which one you get you'll find something interesting, even though its within the oHm range, it likely won't fire..ops, yup your way up there on the Amp draw on that build you've got. Stick to 28 gauge or 30 gauge wire for now, play with the micro spaced 1.0 ohm coil rather then the low ohm .xx coil. I'll say this much if you master the micro spaced coil rather then the microcoil you can put most Sub Ohm builds to shame without even trying, I've been doing RBA's for around 6 years now so been through just about everything imaginable.
As always before you even attempt to do your first build..complete the following.
Buy a basic RBA kit and or purchase the below.
Screwdriver set
Scissors of descent quality
Flush cut wire cutters
Wrapping rods or something to wrap your coils around
Ceramic tweezers
Pliers
Mod stand (this is more of a convenience thing for you)
Volt Meter or good quality MOD ohm meter (DO NOT SKIP THIS)
Wicking material of your choice (Cotton, Rayon or Silica)
Learn oHm's Law, this is not an option.. Being safe is and should be your first and foremost concern
Watch some Youtube videos on basic coil building (Stay away from the sub ohm twisted wire, tiger wire super Clapton ultra builds that exist, stick to basic for now).
Practice, practice and more practice.
Research here on ECF RBA thread, there is a lot of beginner information there, read through it.
I'm not trying to pick, I'm saying to be safe, follow the rules and you'll find an enjoyable and safe vape nirvana.