If PD told u to change to soy milk means change to soy based.
doesn't necessarily means change brand. my PD told me the brand doesn't matter. but the type of milk is what that suits your baby's need.
best if ur PD can recommend u a feel brands.
my PD recommended Enfamil, Similac, Nan and Frisco for special formula but since your PD suggested Soy i think better to get your PD to recommend 😊
Nur Nazurah Salim