K.M.
I have never had a problem. In fact one time I stopped and compared labels they were made exactly the same way and when I asked the pedi about it she said that 9 times out of 10 most are made at the same place but the different labels are put on. When my daughter was an infant she used enfamil, similac, and carnation back and forth whichever I had a coupon for or was on sale without any problems. I think companies push the stick with one so that they rope you in. Just my thoughts.