What is the ideal baby formula brand out there for 7months plus baby? Now slowly letting my son to try friso stage 2. Whats the difference between the many brands out there?

We give our little one Dumex Mamil Gold. Don't think there is a best formula per se, really depends on what suits your baby. If you are still confused by the many options available, talk with your baby's doctor. He'll consider your baby's health, age, and nutritional needs and make an appropriate recommendation.