Baby milk formula

Hi mummies. As my boy is 10months old, he had been drinking Similac since birth, but as mummy here is not working currently I decided to change his milk formula to Grow. Yes, it’s cheaper. Similac 850g is $59.90 while Grow 900g is $18.30. Would like to know if the taste would be different and also the ingredient in it. And also mummies can share what other cheaper milk formula to share which is nutritious and also not so costly! TIA 🥰🥰🥰