The difference between Pampers Baby Dry and Pampers Swaddlers overnight diapers is that Pampers Swaddlers overnight diapers are more absorbent for holding more urine overnight and leak less than the Pampers Baby Dry diapers.
Pampers baby dry diapers are good absorbent diapers for both daytime and night time and do hold up pretty good for babies or toddlers that pee a lot both day and night.
However the Pampers Swaddlers overnight diapers are even more absorbent and if your baby or toddler is leaking through diapers at night then giving the Pampers Swaddlers overnight diapers a try can help stop diaper leaks overnight.
You can also use the Pampers Swaddlers overnight diapers on your child during the day as well especially when you're on a road trip and can't change the diapers as often.