If the part number on the box is exactly the same, it's probably the same thing. Often, to prevent cross-shopping, they'll make up similar items with exactly the same name, but minor differences for each seller. IOW, you can't just go by the 'name' on the thing, you have to compare the exact same part numbers as well. THen, because the big box stores often sell a 'kit' of components, you can't tell, since the manufactuer often specifies them as individual pieces. It's tough sometimes, unless you have both in had to see if there are any differences, and even then, without taking it apart, you may not be able to tell easily.