The only brand my son could stomach (without stomach problems) was the premixed Enfamil Lipil. Powdered formula of ANY kind made him miserable, and several of the other premixed formulas also made him ill or he just outright spit out and refused to drink more than an ounce or two at a time (when he usually drank 1.5 12oz bottles in a sitting).
As someone who has tasted EACH AND EVERY SINGLE formula out there... they are sooooooo NOT the same. They are all quite different from each other. I mean, beef is beef but there's about 1000 different ways to cook the same beef... even if all of them come out nutritionally the same.
What I wonder, however is if she's spitting up because she's GULPING a formula she really really loves?
- burping during feeding (breaks), and a really long burp afterward
- different flow nipple