If you average it out, the XBone technically only sold about 77K units per country, vs PS4's 500K + per country.
I have no opinion at all about how good either one was, but this here is an abuse of reasoning.
Suppose that the two countries that PS4 launched in were India and China, while the 13 that XBO launched in were Vatican City, Nauru, Tuvalu, Palau, San Marino, Monaco, Liechtenstein, St Kitts & Nevis, Marshall Islands, Dominica, Andorra, Antigua & Barbuda, and Seychelles. And both had sold 1 million exactly across their respective countries. Then PS4 would have sold to about 0.04% of the population of those two countries, whereas XBO would have sold to over 170% of the population - as in, more XBOs than people. Would it still be fair to say the PS4 did better because it sold 500K per country on average?
No, if you want to do it fairly, you have to compare based on population, not country count.
So let's do this fairly.
Xbox One has gone on sale in the following countries: Australia, Austria, Brazil, Canada, France, Germany, Ireland, Italy, Mexico, New Zealand, Spain, UK, and USA. Roughly speaking, the total population of these countries is 1,029,000,000. PS4 went on sale in US and Canada, which represents about 352,000,000 people. So the Xbox One sold to 0.097% of the population of the countries it released in, while the PS4 sold to 0.284% of the population of the countries it released in. That's less than three times the proportion, not the excessive 6.5 times difference you asserted.
Still better for the PS4... although, the real comparison that needs to be done is "how many units were sold in the US and Canada?" - it's entirely possible that 800,000 of the Xbox One units were sold in US and Canada, making the real difference much smaller.
Anyway, like I said, I don't care in the least about the stupid console wars themselves, and this reeks of console wars. But I care about abuse of mathematics, and you abused it pretty badly.