PS4 2nd year (2015) x Switch 2nd year (2018)
Jan - 190k / 270k
Feb - 340k / 280k
Mar - 330k / 310k
Apr - 175k / 170k
May - 155k / 165k
Jun - 370k
Jul - 220k
Aug - 210k
Sep - 355k
Oct - 275k
Nov - 1540k
Dec - 1580k
Switch is ahead by 5k.
From Resetera.
Switch will probably win Nov and Dec.