PS4 is outselling XB1 worldwide as a whole and as individual countries. That is a fact, whether its through VG Software sales charts, Amazon Sales rankings or whatever you want to use. XB1 fans even admit it. In spite of the DRM reversal, PS4 continues to outrank the XB1 in sales. Is it 1.1-1, 3-2, 2-1? who knows, it doesn't change the fact that it is.
THIS ONLY APPLIES TO THE UK AND US
Unless Sony decides to not market the PS4 at all, marketing will not make a difference regardless of how much Microsoft throws at it, because Sony can also market the console. + its $100 cheaper.
Initially, games will not matter because Its not like 1 system has BF4 or COD coming out exclusively for that system.
One has killzone, and Drive club while the other has Forza and Dead Rising. Most people wont care since they all have BF4, COD, Madden, Fifa, Lego Marvel for kiddies, NFS, etc. out our approximately 15 launch games each, 12 are the same, maybe XB1 has one more that will actually sell at retail.
Unless there are hardware problems for the PS4, for the First 6 months at least, PS4 will continue to outsell Xbox. that is as close to a common sense fact whether people want to believe it or not. Only thing MS can do to change that is Release HALO, preferably HALO AND GOW next year. That is all.
THIS APPLIES TO REST OF THE WORLD
MS can't do anything. They couldn't take away the stranglehold from Sony even with cheaper SKUs, over a year head start, and HALO. Only thing they can do is pray and hope the PS4 hardware has so many problems, people have no choice but to buy XB1.
Easily PS4 will outsell XB1 4 to 3 during the first 6 months of launch in the US. That is assuming MS can market the system positively, otherwise it will be worse. Elsewhere in the world it will be 2 to 1, just as it is right now between the PS3 and XB360, especially with it being $100 cheaper. That is common sense.