"Psycho Cut vs. Confusion for Ice Beam Mewtwo"

#PokemonGO: I have a full team of Mamos to counter Rayquaza, but for funsies I'd love to use my 96% 15atk, almost maxed Ice Beam Mewtwo.Historically I've never read of a clear winner between the two fast moves, but every Ray counter infographic lists Mewtwo with Psycho Cut. Can anyone explain why it's the preferred move in this scenario? Thanks! via /r/TheSilphRoad https://ift.tt/2XYz0UM