I'm pretty sure that, through XML and GUI modding, pretty much everything on the Xeno Ethics tech and ensuing choice can be changed. This is good news, for sure.
But the question arises: is it possible to duplicate the Xeno Ethics tech, edit its name and description a bit, and supply it new information for a new GUI window and end up with two researchable Xeno Ethics choices?
This question is a big thing behind the Star Wars Mod Team's possibilities.
I'm going to do some testing of my own, but if I can't work it out I'd be very excited if a dev or other modder can fill in the insights on this very special tech.