Difference between 20120 and 12020??

[RC-Monster Mike]

For an xl motor and room to breathe, the 120 amp warrior is the one IMO. The 9920 can handle quite a bit, but the xl motors can also draw a lot of power. the 8xl or higher can get away with the 9920 more easily for sure, but a 7xl with some voltage is indeed pushing the 9920(it is proven to work, but the 12020 is better IMO).