Maximum PC: Love or hate Windows 8, you have to give Microsoft credit for its tenacity. Most companies would’ve tucked their tail between their legs and run home crying after the disaster that was Zune, but Microsoft doubled down to bring a better-than-before effort rebranded as Xbox Music to its Live Tile-equipped ecosystem. With unlimited music streaming and the ability to buy individual tracks, Xbox Music looks like a hit on the Surface. (Get it?) But how does the new music streaming contender stack up to Spotify?