PS4 will catch up again with the next update that includes today and again the update that includes tomorrow.
For the month on Amazon excluding the last 2 days of the month, we have:
X1 #3 #56 #70
PS4 #17 #20 #65
I'd put the X1 ahead for the month and the sales of it's #56 pr #70 being the difference.
So with the PS4 sales from today and tomorrow added it's going to be extremely close.