The BCS on Woodward is more of a boutique clothing shop, with a few skis upstairs. Most of the guys who work upstairs seem to snowboard and don't know shit about the skis. The one in Novi seems to carry more skis/boards and less outerwear, and the staff is a lot more knowledgable.
That being said, neither of those stores comes anywhere close to Don Thomas. Best ski shop ever. The employees are all die hard skiers and know their shit like the back of their hand, and most of them are expert boot fitters. Plus, they're really honest, and will tell you to stay away from a product even if they stock it when they think it's bad.