Wow, I never even noticed you could sort Amazon sales by month? Anyway, it shows this (XBO #4, PS4 #8 for Dec):

http://www.amazon.com/gp/bestsellers/2013-12/videogames/?tag=viglink129408-20#1

Amazon seems pretty heavily PS4 sales biased (ROAD on GAF showed how in UK Dec, PS4 was 9th vs XBO 81st, yet PS4 only beat XBO in actual revealed sales by 44%)

So perhaps a clue XBO will win DEC NPD? Or perhaps nothing.

Also has Xbox winning November...

Xbox will win in the US

didnt playstation have 5 different models?

That November list makes that whole thing very hard to believe, you have AC on PS4 at 5, Killzone at 9, Cod PS4 at 11 and the Controller at 14, but the console itself is nowhere to be found.

Look at the prices though. PS4 is being sold for 130 dollars above MSRP.

No they won't

Ugh. Why is Amazon so difficult to use? I'm just trying to see which console ranked higher in electronics for December 2013.

Well, I don´t find it it strange at all since it could be that PS users are more likely to buy there software from Amazon than their hardware while XBox users are the opposite.

And overall 2013 says PS4 #6 and X1 #19.
Also fun is 2014 with PS4 #2 and X1 #13.

See, I can cherrypick stupid unreliable lists too!