Difference between giffen goods and inferior goods?

In consumer theory, an inferior goodis a good that decreases in demand when consumer income rises, unlike normal goods, for which the opposite is observed.[1] It is a good that consumers demand increases when their income increases. [2]Inferiority, in this sense, is an observable fact relating to affordability rather than a statement about the quality of the good. As a rule, too much of a good thing is easily achieved with such goods, and as more costly substitutes that offer more pleasure or at least variety become available, the use of the inferior goods diminishes.