PS4 has "50% more raw power" in graphics than Xbox One, says report

[flagstaad]

Somini said:
It seems that Gen 8 is a repeat of Gen 7. Wii U the weakest console in the graphics departement, Xbox One and PS4 close to each other, with PS3 and PS4 having more power than their respectful counterparts.

So PS4 vs Xbox One difference is around 50% in favor of PS4.

% difference between Xbox One vs Wii U? Wii U x 3 = Xbox One? more? less?

How big was the Wii vs Xbox360 difference?