Why do you have two different link formats?

The spotify: URIs are the real Spotify addresses. The http://open.spotify.com/ URLs are a workaround to give you clickable, blue and underlined links in instant-messenger and email applications that don’t yet recognize the Spotify URI format. When there is a choice (such as when you are creating your own hyperlinks on the web), always use the spotify: addresses. What happens when you click an http://open.spotify.com/ link is that a page is opened in your web browser that redirects you to the real address (the spotify: equivalent). When you have control over the links, that’s a redundant step. And if you’re a software developer, please consider auto-detecting the spotify: URIs in your applications.

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