I agree with the other posters above that the amenities in a 2 bedroom are definitely better (laundry, kitchen). Just want to add that the upside of two studios is privacy and time apart from the other family. No matter how much I love my travel companions, I need space and time to decompress. Or if the people I’m travelling with aren’t good cooks but think they are and want to show appreciation on the trip ...
Obviously depends on your personal preferences

Edited to add: or night owls vs early birds and light sleepers!