So sales between the two are getting closer and closer and we're hearing of overtracked and undertracked for both in certain places (not undertracked for WiiU mind).
VGC current sales stand at 7.378m for WiiU and 6.734m for XB1, a gap of 644k.
I know VGC uses its own sets of figures and doesn't rely on Chartrack and NPD ect, but it does usually adjust to be more in line with those.
NPD shows WiiU overtracked 20k for the month of October and XB1 about 60k.
Charttrack show (assuming week ending 15th is 30k again for XB1) XB1 is undertracked in the UK over 160k.
There is also the debate over whether 190k on shelves for WiiU is enough, ioi disputes that it is (and so likely no adjustments will come) but a lot of people here agree it's odd WiiU doesn't have much stock on shelves but PS4 and XB1 have millions (yes even though the weekly sales see a big gap, it's an even huger gap for what's on shelves/channel).
Then we have the sales for week ending 15th which should show "around" 300k for XB1 with the release of Halo MCC and Assassins Creed, and 100k for WiiU as it naturally rises into the holidays. Another 200k~ lead for XB1.
All of this said I believe WiiU is overtracked a good 60k end of September (250k on shelves seems more than reasonable.) along with 100k this week, putting it at 7.418m.
XB1 is overtracked in the US 60k but undertracked in UK 160k+. Along with 300k this week puts sales at 7.134m
Gap end of 15th = 284k.
