Prevacid vs. Zegerid

My youngest daughter is now 4 weeks. She’s on the MARCI dose of Prevacid (and has been since week one) and neocate. She is still super fussy and has started to struggle with a couple of her feeds. She has all of the classic symptoms of colic, too, but her constant crying and now the feeding development makes me wonder if we haven’t totally managed the reflux. My other two were on Prevacid and responded well. My pediatrician mentioned using Zegerid instead. He said some babies respond to this better. Has anyone had a child who didn’t get their reflux managed with Prevacid or had better success with Zegerid?