They both carry an organic brand created by Supervalu called "Wild Harvest." Supervalu operates Cub Food stores (no longer in our area) as well as Save-A-Lot, they also have relationships with several smaller independent retailers, who carry their private labels like Wild Harvest and Flavorite.
Dorothy Lane Market certainly seems to be more and more concerned with creating their own brand, and were recently recognized for their efforts in a national forum by Supermarket News.
As long as these stores continue to carry the Wild Harvest brand, however, here's an advantage for those of us trying to find affordable organic products. Wild Harvest issues coupons but you'll likely have to follow them on Facebook to know about them.