Store brand formulas?

Da

We have my son on Kirkland Signature (Costco) formula. Just found out that Abbot, the manufacturer (maker of similac) is no longer distributing to Costco so they’ve switched to PBM Nutritionals for their formula. This is the same manufacturers that make most store brand formulas.

I’m so upset because I JUST switched from combination feeding to solely formula feeding, and I was okay with this because I did SO MUCH research on the formula we had him on and was super confident in my decision. Now I’m second guessing it and can’t sleep because all I want to do is research formula and figure out the best bang for my buck when it comes to feeding my baby.

Has anyone had their babes on any store brand formulas? Parents choice, up&up, comforts for baby? How do you like it? Would I be better off just paying double the price for Similac?