Not to mention that an apple store employee has to have significantly less knowledge than a best buy employee to be just as helpful. In the average best buy employee's department, there are probably a couple hundred products that they might receive questions about, plus a couple thousand more products that don't really require knowledge, like cables or cases. An apple store employee has to know apple's entire lineup, which by my count looks like less than 20 products (not counting variations or configurations).

Part of this goes back to Apple Store employees being trained to be helpful and knowledgeable, while Best Buy's employees are trained to upsell and prevent shrink.