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?

I would say all brands are the same . In Singapore, all formula milk will have to go through tests before they can be on the shelf. Both my kids are also on Friso, my eldest isin Pri 6 now and still taking Friso 4. I can say, she's growing well, and slightly taller than her classmates.