It doesn't make a difference. My dad is a premie doc and said they are all fine. It's your and babies preference.
Jenna is on Gerber Good Start Protect....Powder form she likes it...
She was on Similac Neosure for preemies but it made her constipated so we switched..
Powder cost less than liquid... it's your preference really.
thats the same daniella takes and it has worked great for her, i use the powder and for the first week i tried the liquid one but then switched to powder and no big deal she seems to be happy on that...i dnt think there is a difference really...