@Gloria,
Many of the big retailers (Walmart, Lowes, Best Buy, Home Depot, etc) will have their own versions of the same product as the other stores, but the model number is different. Maybe the Home Depot unit will have an "HD" as part of the model number, whereas the Lowes version will have an "L". That way they can avoid having to price match (not the same model) and it keeps returns to the proper store.

I've seen the return line at Home Depot where a customer brings back a whole basket of stuff, and the cashier sorts it out into two piles, "ours" and "not ours". Sometimes the customer will get upset because they won't refund money for a product that he could not have purchased there.

The mattress retailers are notorious for this scheme. You won't/can't find the same model because it is made /labeled only for that store. "Sit-n-Sleep" in California is known for this.