Forza Horizon would be doing better on ps4. Europe is more interested in racers than NA and ps4 install base is much higher there. Plus ps4 is still missing a great open world racer.
Sunset overdrive should have come out on the Wii U, might have helped the system somewhat.
Killzone 2 and 3 would have done better on XBox 360.
Valkyria Chronicles and Wipeout should have stayed on ps3.