I don't think it's a publically released script. More than likely, one is copying the other in terms of functionality, as well as certain html aspects, but the only way to be sure is to see the php code for both sites.
For example, googling "tasks.php?seeker=" which is one of the few unique lines that shows some functionality, I only got 2 sites that returned and that was the 2 you listed.
"tasks.php?seeker=" - Google Search
This doesn't mean much but these 2 sites were definitely designed in an effort to make one mimic the other. But if it was a script that you could buy/download, then there would have been more results from google (I find it hard to believe that these 2 beta sites are using some commercial script).
And with the advent of "cloned" sites, finding someone willing to do this is pretty common now.