Marlene Alexander:If it isn't a name brand product, it's probably not going to be as good.
There are of course exceptions. I much prefer the store brand of iced tea mix over Lipton's. The only way to find out is to try it. Some are merely repackaged versions of the name brand. According to DW the store brand of mini wheats is not as good as Kelloggs. And I found that Bounty paper towels are much better quality than the store brand. All of Campbell's soups have wheat flour or a derivative in them, which I can't eat, and many of the store brands don't have it so I'll buy those. The same for store brand packaged rice vs. Uncle Bens.
One of my neighbor's sons works for Mobil Oil, and he says Wal-Mart's full synthetic motor oil (~$2.40/quart) is the exact same stuff as Mobil 1 (~$5.50/quart).