1. Spotify's family plan let me share my plan with Android users
2. I get a 50% discount from my credit card, so it's only about $7.50/mo for the family plan
3. I love Spotify's Discover Weekly playlist
4. Spotify's UI was better, even though it was uglier than Apple Music's UI. But it's been a year or so since I used Apple Music, so maybe it's better since then.
5. Spotify works with the Amazon Echo. I put this one last because I forgot about it - but it's huge to me because we have a few Echos in the house and we play Spotify music a lot. I probably won't switch back to Apple Music unless the Echo gets Apple Music in the future.

What I think is better with Apple Music:

1. Siri integration. This is the biggest thing - and it's a huge selling point. I'm hoping iOS 11 will give Siri integration to Spotify, but I don't know.
2. Prettier UI than Spotify, which I find rather ugly.
3. I don't have an Apple Watch, so I'm not missing anything there but that is a big benefit.