Hindi exactly the same ang NAN HW at NAN HA, iba ang formulation nila based sa specific needs, kaya better ask your pediatrician kung alin ang mas swak for your child since they know your baby's health history best. A few of us moms na nag-switch between formulas kasi out of stock din, noticed some babies adjusted well while others had slight tummy changes, so it's really case-to-case! If NAN HW is hard to find talaga, bring the ingredient list or product info sa doctor and they can recommend which NAN variant is closest or safest for your little one.