Food Allergies Treatment

Which is a better choice for a baby with a milk allergy? Enfamil Prosobee or Nutramigen? Which is nutritionally better for them? What are the pros and cons of each formula?
My daughter is 2 months and she is on prosobee because she cannot tolerate milk based formulas. We were on regular enfamil lipil, tried lacto free, and gentlease. All those resulted in projectile vomiting and poor weight gain and eczema. The only one she could stomach is prosobee. I have not tried nutramigen yet.
But i was reading about how bad soy formula supposedly is with the hormones and everything, but i don’t know much about the nutramigen i just know that it is highly processed. What would be the healthiest choice for my baby?
Please no rude comments about breastfeeding. I know that is the best choice for her and I am very depressed about this and i feel like a horrible mom because i didn’t try hard enough with breastfeeding. I wish i could try again. I wouldn’t give up so easy.
Thanks for your answers in advance.