QUESTION: Any moms ever use a particular name brand of formula but occasionally purchased the generic store brand…

QUESTION: Any moms ever use a particular name brand of formula but occasionally purchased the generic store brand version of it to give their child if the store you usually get it from was out of stock? I use enfamil gentlease because it's the formula we tried that my baby takes without getting horribly fussy or gassy but I was running out of it and the local store I went to was out of stock of the enfamil brand of it which forced me to get their store brand version of gentlease. Any mom's ever do this occasionally with no real issues or side effects? I know they say you shouldn't switch formulas once you have them on a particular brand, but I feel like because it's only the store brand and not a whole different line of the namebrand with a different make-up (ex. Newborn, prosobee etc.) it shouldn't be an issue.