UK Charts Week Ending 22 November 2014

[GribbleGrunger]

man-bear-pig said:

GribbleGrunger said:
PS4 dominating in the UK again. It seems these exclusive advertising deals aren't doing MS any good whatsoever.

Wut? How do you know that? Xbone could've outsold the PS4 this week too for all we know

One would think that if one version charts above the other version then that version sold more ... no? How else are places in the charts decided?