How much of a differece Sub Domain vs. Sub Directory make in 2013?
In 2012, MC said :
“The historical reasons why you might’ve wanted to go for a subdomain don’t really apply as much, and that leaves you with, okay both are on the same domain, overall, and so it’s really a question of which one is easier for you.”
Around the same time, some SEOs started noticing that Google favors Sub directories for sites such as Amazon, Facebook and etc.