The differences are that, 1) the music distributors supplying Walmart were already distributing "clean" versions for radio play, so Walmart simply chose those v

The differences are that, 1) the music distributors supplying Walmart were already distributing "clean" versions for radio play, so Walmart simply chose those versions over the explicit ones, and 2) you can buy CDs from any other retailer than Walmart and get the explicit versions if you want. You can only get iPhone software from the App Store.