I don't think you know what globally means.
And no, real time Amazon rankings whilst accurate are not indicative of total sales.
You need to look at the Amazon rankings for 2014.
http://www.amazon.com/gp/bestsellers/2014/videogames
Ps4 is number one and Xbox is 25. If the xbox number starts to drop then that means the gap is closing.
Oh and also, one retailer does not = all retail.







