I dno if my reply would help, but I noticed it too for Similac and Nan. My daughter, when drinking her Similac, had really bad diarrhoea, and my son just refuses to drink his Nan. So we never bought FM from Msia anymore. Their powder is much thicker also, seems very hard to dissolve in water. Recently read about a mom who's son started having watery yellow poop for days because she tried the Msia version. So scary.
Its packaging laws by the respective govt.. example Singapore can put the brand Frisolac GOLD regardless of any stage. However Malaysia can only put the word GOLD only from stage 3 onwards. For Singapore they don't allow promotion for stage 1 and 2, while Malaysia don't allow you to do branding or posh words like gold for stage 1 and 2. As they encourage breastfeeding for kids below 1 years old.
Yuni Azman