well the bio3 core is a good core and will last a long time, but just not as light as the nova. the nova its self isn't super light just lighter than the bio. In the trailer for Defy Murray was using the bio core, so its not like they never use it.
the nova's are made in the United Arab Emirates, that's probably what she means by taking it to a third party, i think she just maybe used the wrong terminology. I'm pretty sure they make a few just for the pro's for comps or what ever. the bio3 cores are made somewhere else.
i noticed that same thing in this video of scott riding, he had the nova core. by the way the murray shape hasn't changed since 2010.
I wouldn't doubt Rusty riding the nova cores because the bio marek is sooo heavy as well as the byerly jib. there basically tanks. In comparison to any boards ive picked up.