My dd (now 5 years old) threw up every bottle. We tried four different formulas until pedi suggested enfamil AR. That was a saving grace. She never threw up another bottle
After that. The Enfamil AR solved all her problems.
We used Enfamil A.R. for DD's excessive spit-up. Like the PP, she spit-up every bottle too, until we put her on that. We never tried Similac Sensitive for her. Now, with DS he has been so fussy and irritable lately and he is on Similac Sensitive right now. I'm not sure if he has colic or gas but I think we're going to switch him to Enfamil Gentlease, and if that doesn't work then A.R.
I have used both and they seem to be the same. It's all really a matter of preference. I chose the famil, but only because that's what my local wic office offers. Best of luck with your little one.
Re: Enfamil AR vs Similac for Spit up