APC Replacement Battery

so i recently set out to replace uh two actually apc batteries for my battery backups one was a rbc 17 and one was an rbc 7 which i'll get to later because that's a much bigger battery but anyway while looking through amazon i saw a bunch of reviews and many people said well if you look behind the label of an apc battery it's not actually even though it's labeled genuine rbc it's not actually you know there's there's a generic maker of it behind the label but sure enough i peeled back the label and um you know they were they were right this is an alternate company it's made by csb um and i thought well geez they're just really just putting a label on and repackaging it and calling it their own it turns out there are a few um you know little modifications that they make and it is a slightly different battery but my question was will it work can i replace it is it the same i mean look at