Types of feeding help !

So from the beginning my daughter has always had to have a supplement of formula because I was never able to produce enough breastmilk, in the hospital we got similac, and we’ve continued supplementing similac - But recently we heard great things about enfemil or however spell it &, while I was pregnant, I subscribed to this formula thing that sends me sampled formula - so my question is, is it bad to go back and forth between similac and enfamil if it has the same type of “benefits” ? Or should we stick to just one type of formula