Oh, I hear you, that crying sounds really tough! So from what mums around me have shared, both Enfamil and Similac can work well for constipation, but it really depends on your baby. Some swear by Similac Total Comfort because it's gentler on digestion, though a few have actually found Similac caused constipation for their little ones, so it's not a sure thing. Others have had better luck with Enfamil Gentlease, it's designed to be easier on the stomach and seems to help a number of babies poop more regularly. One thing several mums mentioned is that alongside whichever formula you pick, adding things like probiotic drops, fruit purée, and even gentle bicycle exercises can really make a difference too. That said, since your baby's only been on S-26 and the constipation just started, it could be worth discussing with your doctor or a lactation consultant to rule out other causes, sometimes a formula switch helps, sometimes it's just a phase, and they'll know your baby's history best. Wishing her (and you!) some relief soon!
Honestly, I'd say it really depends on your baby's tummy rather than one being universally "better", some mums swear by Similac and say their babies do really well on it, while others found Enfamil gentler on digestion. Since your little one is already on S-26 and suddenly constipated, it might be worth trying Enfamil to see if a formula change helps, but I'd also check if she's getting enough water between feeds (especially since it's warm here) and maybe chat with your PD about it, just to rule out anything else. My neighbour actually switched her baby from one brand to another when she had the same issue, and it made a difference within days, though every baby's different. The good news is constipation from formula is usually quite fixable once you find what works for her tummy. Definitely worth getting your doctor's input though, especially since she's half breastfed and half formula-fed, they might have other suggestions too!
afraid there’s no one-size-fits-all “better” formula — each has strengths