I think Staples vs. Office Depot/Office Max retail locations is similar to Home Depot vs. Lowes. In some areas, one is better, while in others, a different one is better.
Where I live, Staples has multiple locations that are clean, organized, well-stocked, and always have customers. They have copy/printing services, UPS shipping, etc. There's only one Office Depot location, which is dirty, in a way oversized space (so when you walk in the front door, there's about 30 feet of empty space before you get to the registers and then merchandise), always disorganized and sold out of what you want. Individuals, teachers, small business people, etc. all go to Staples; the only reason to go to Office Depot is if you are in a hurry and you are by their store.