I posted that news post here the day it was put up (the 17th) but a lot of people seemed to have missed it.
Sheepishly raises hand...
I think John Eaves and Scott were right, it was a legal requirement, but not in the way they thought it was, it wasn't about rights, it was about marketing.
There is a 25% difference so CBS could copyright it and market/merchandise it as a separate ship. You know, for money.
That makes sense.
And squares with John Eaves taking down his post because too many were misinterpreting or misrepresenting it.