Bread can be healthier than buns, but it all depends on the kind of bun and bread being compared. For example, one slice of white bread is healthier than a single sweet bun which can have a high amount of carbohydrates and sugar. On the other hand, one whole wheat bun might be healthier than a slice of white bread.

Sweet bread is often shaped as a loaf or bun, while cake is typically baked in round or rectangular pans and can be layered and frosted. Sweet bread requires time for yeast fermentation, while cake relies on chemical leavening agents for rising.