Unless you live in another country (say a backwater like Sweden).
Then you are told by iTunes: "The item you've requested is not currently available in the Swedish store"
Then you are told by iTunes: "The item you've requested is not currently available in the Swedish store"
I don't use iTunes and thus can't compare their respective librairies, but I know first hand that even in more remote corners of the musical world (think obscure recording of a jazz reprise of Bach), Spotify almost always delivers.