What is the difference between Audius and Spotify?

Could you please elaborate on the key differences between Audius and Spotify? I'm curious to understand how the two music streaming platforms differ in terms of their business models, user experience, and any unique features that set them apart. Is Audius' decentralized approach to music distribution a significant advantage over Spotify's centralized model? Additionally, how do the two platforms compare in terms of their catalog size, availability of exclusive content, and the overall user community they cater to?