Even though it has music folders (Skydrive has document or photo folders) you can, like Skydrive, only play songs one at a time rather than all of those in a single folder. However, it is another 5GB for free so I won't complain about it.
One more thing, if YouTube can allow you to make playlists then the first out of the gate with this will definitely have an advantage.
BTW: I don't know about Google Play as Google can't upload from a browser (special non-W2K program needed) while AT&T & MS let me use the Fox (FireFox that is).
All IMHO so YMMV