Prime Music and Amazon Music Unlimited are both streaming services offered by Amazon, but they have some key differences: 1. Prime Music is included with an Amazon Prime membership, which also includes other benefits. With Prime Music, you have access to a limited selection of songs and playlists, around 2 million songs, and some of the features like ad-free streaming, offline playback, and hands-free listening. 2. Amazon Music Unlimited is a separate subscription service that offers a much larger catalog of songs and playlists, over 60 million songs, and additional features like high-quality streaming, access to exclusive content, and the ability to download songs for offline playback. 3. Prime Music is more of a complimentary service for Prime customers, whereas Amazon Music Unlimited is the primary music streaming service for those who want more choice and features. 4. The price for Amazon Music Unlimited varies depending on the plan you choose and whether or not you are an Amazon Prime member.