I have an Ecommerce site and i am wondering what url structure would be better for seo. For example should a site selling shirts have the category page as colorfulshirts.Rom/shop-by-tyle/green-shirts or colorfulshirts.Rom/green-shirts ... with the keyword being green shirts, which would be better or is there not much of a difference? thanks (excuse the .rom as i am a new member and cant post links.. thanks)