here is some info on both. if there is an issue with baby's digestion after switching I would talk to them about the ingredients because baby may have a sensitivity do the increase or decrease in certain ingredients.
disagree with babytj0214... they make several different formulas. do you know what the switch is? I know my eldest did well with simulac but my son couldn't handle it and I had to switch him to carnation, and my third was on a soy based formula. so it does make a difference.
all formulas are the same..... the only difference is the brand and calories and different protein..... some babies like it some babies dont..... some like powder some like liquid