The mastering on Landr is exceptionally good for AI mastering, but AI mastering really isn’t all there yet, and you should be doing your own masters, or paying a professional to.
(on a related note, check out our best mixing & mastering services guide). On the other hand Landr’s dashboard is a lot prettier than Distrokid’s vastly outdated look, and also comes with a free mastering service (up to 2 tracks/month). Which is better for you entirely depends on what you need, but we’ve personally used both, and Distrokid is cheaper, faster & one of Spotify’s listed preferred distributors. Landr costs $89/year for unlimited releases, & smaller priced plans charge for each single/album released. Distrokid is a Spotify preferred distributor, & Distrokid allows you to release unlimited singles/albums for $19.99/year.