Yeah, free-range animals have outdoor access while cage-free ones doesn't. But then again, it's still pretty vague and doesn't tell much about other factors of their well-being...
Or like the ratings in German stores - even if they are true, the differences between 1 and 4 are still too low, in my opinion. Look at the size of animal enclosure:
4 is surely better than 1, but still - a 100kg animal in a 1.5 square meter space doesn't exactly scream of well-being. And number 3, Außenklima, suggests that the animals have "outdoor climate", but after a quick research, it appears that having a window open in the enclosure is enough to get that ranking... So yeah..