JRPGfan on 12 January 2018
OP apparently Resetera has the ratios and they are:
"Volume of game sales in December (US)
Other doesn't include Wii U which is separately counted but its number is minimal
Highest, 2nd Highest
Hardware:
Other:Xbox One:PS4:3DS:SW 0.59:0.91:0.72:0.50:1.00
Software:
Other:Xbox One:PS4:3DS:SW 0.27:1.69:1.90:0.42:1.00"
So Xb sold 91% of the Switch sales, and PS4 did 72% of them.
Hardware : NSW(1.0) > XB1(0.91) > PS4(0.72)
Software : PS4(1.90) > XB1(1.69) > NSW (1)
