In my opinion:
XBOX ONE have 3% of probability for outsell PS4.
Wii U have 2% of probability for outsell PS4.
PS4 have 97% of probability for outsell XBOX ONE.
Wii U have 34% of probability for outsell XBOX ONE.
PS4 have 98% of probability for outsell Wii U.
XBOX ONE have 66% of probability for outsell Wii U.