How to Cannibalize a Clothing Brand

Steve is thinking about cannibalization because it does crossover with some of the existing products they already and particularly looking at branded versus unbranded stuff as well. The big question is should that sub domain, so it's currently the two clothing dot Sainsbury's dot UK slash browse slash brands? Should that be separated from the main domain since it's a separate sub brand? Should it sit under something else? Like most of his visibility comes from branded phrases, but the unbranded stuff is basically non-existent. Do you think I know it's an endless conversation and SEO of sub domain versus sub folder like where do we go from here? What do you think?