It's easy to test the difference. Just go to the demozzz link for Orca 2.0.
http://www.demozzz.com/orca/beta2/?lang=en

Then go to a topic and then hit the "back" button on your browser. You see that it goes immediately back. But on Boonex.us, it shows a "loading forum topics" screen before going back. Is that because Orca in Boonex.us is not standalone?