Unless she has issues already I would say not much, provided with the active ones the teat is filled with milk when she's drinking to reduce air swallowed. Anti colic are built to reduce the air swallowed and control milk flow. I never found no real difference just less faffing as anti colic bottles have 20 pieces to wash!
Would recommend the anti colic ones. They are also self sterilising (I don’t think the others are) and very quick to clean!
They’re easier but harder to sterilise x
From what I figured out the easy active just aren't self sterilising or anti colic they do come with a size 3 teat if I remember rightly, they didn't work for us just because I had the gassiest baby alive who needed anti colic bottles much longer than he probably should've, they're a bit of a pain to clean but all mam bottles are tbh