Breastfeeding is easier, even though it may not seem so in the early days of learning how. But with breastfeeding, there's nothing to buy, store, fix, heat, clean, or throw out, so a nursing mother's time can be spent enjoying her baby, not fixing bottles. Babies who are carried in arms or in a sling, next to their source of food and comfort, tend to fuss less, making them more fun for everyone to be around.
Formulas are more expensive.
Formula-feeding doesn't smell as good. Different intestinal bacteria go along with formula feeding. The different bacteria, along with less effective digestion, mean smellier diapers. Even their skin and breath smell different. Breastfed babies are more portable.