What's the difference between Spotify and Apple Music?
SpotifyとApple Musicはどう違うの? - What's the difference between Spotify and Apple Music? になります。
What's the main difference / What are the main differences between Spotify and Apple Music? もいいと思います。
main difference - 主な違い
Are there any differences between Spotify and Apple Music? も大丈夫です。
色んな聞き方があります。