Both services offer a free starter plan capped at 2GB. They both integrate with iTunes or can be configured to manually upload music from specific folders. You can stream over any browser, or by using their dedicated mobile apps. The two services have so much in common, actually, that it can be hard to decide which one to use.
So, if you're sick of waiting around for Google or Apple to create their own CNET Prizefight.music lockers, our CNET editors are here to weigh the pros and cons of mSpot vs. MP3tunes in this week's