Formula Milk

what formula milk is better for 8mos old baby? I'm using Enfamil A+ Two now, but I want to use Nan Hw again which is her formula milk in the past. I'm having trouble when I bottle feeding my baby, hindi kasi niya inuubos or minsan ayaw niya talaga mas gusto niya magbreastfeed saken. But I have this feeling na paonti na milk ko. ☹️