“This was due entirely to [Xbox One and PlayStation 4] generation sales, which rose by 12 percent to offset the 66 percent decrease in hardware sales for last generation consoles.”
So if last years October NPD is
PS4: 297k
XBO: 168k
12%
= 520.8k
and XBO is 304k so PS4 is 216.8k?
because if you increase October 2014 PS4 numbers by 12% it beats XBO.