There could be, simply because biological diversity is such an important factor in all of life. Babies have different shaped mouths, different sucking patterns, and different levels of physical strength. What looks to the analyst like small size or odd shape may be perfect for a given baby. Even when a newborn and his mother struggle a bit with breastfeeding at the beginning, it is important to remember that babies grow. Facial structure changes.
Muscle strength develops.
Never underestimate the power of a mother and baby to find a position that works well for them. A variety of studies have shown that infants can regulate their intake volume and the amount of fat in their feedings. If a mother and infant are encouraged to find a pattern that suits them, they are less likely to experience any problems with milk supply. It is interesting to note that in most women the right breast is smaller and most humans are right-handed. Size of breast does not predict quantity of milk produced, but there are often asymmetries in breast milk output, even if there is no obvious bias in breast use.