OS4 OpenDesktop 13.1 Review: What's the difference with ZevenOS?

It is kind of a peculiar feeling to use Linux distros who look and feel very similar. I am talking of ZevenOS 5.0 and OS4 OpenDesktop 13.1. Both got released in 5 days apart and have striking similarities, at least at a high level. Same Xubuntu fork with a BeOS theme, it is difficult to distinguish them from each other.

From OS4 OpenDesktop 13.1

Though OS4 website says, ZevenOS is for Legacy