Let's say I just purchased shoes.com, PR 0, and I have another website called mensshoes.com that has a PageRank of 5. I want that new site to redirect to a subcategory of my new shoes.com domain. So, I have two questions. First, do I 301 mensshoes.com to a subdomain, mens.shoes.com, or a subdirectory, shoes.com/mensshoes? My main concern, of course, is PR bleed and how that would affect the parent domain, shoes.com. Am I better off creating a new subdomain that links to the homepage and build PR for shoes.com that way, or do I pass PR to a subdirectory and hope if bleeds up to the main domain, as well as to lateral pages?
So if I 301 to a subdirectory, that PR and SERP will transfer faster to the main domain than if I used a subdomain?