As you noted, Mega doesn't have the team functionality. But I would never use Mega for a team/collaboration/work setting. Who knows when they'll get shutdown again. The whole thing is way too flamboyant when all people need is reliable infrastructure and services. Privacy is one thing, but trusting important files to a web service founded by someone who is still on bail is a ridiculously huge risk. I'm not judging Kim Dotcom or the team on what they did in the past, I'm just being a rational agent in protecting my files. Also, bitcasa would be a good service to add to your comparison.
Indeed, Mega gets beaten on the team aspect, but I would use it for the capacity it offers. It would really help to have 2Tb off my PC, into the cloud.
That's a pretty bare review.
* Does Mega support write to local disk, and sync to cloud?
* Does Mega support LAN sync?
* Does Mega work on all platforms?
yeah, its bare, because its not a pro-view. As a end user, I only compared broadly. Btw, its hard to say, since I haven't been able to see my Mega A/c work properly until now due to the rush.