But one with vastly more reality-fluid (sometimes known as "measure") and thus, as far as I can tell, moral weight.

This is very thought provoking. Can you add clarity on your views on this point?

For instance, should I imply a "vastly" in front of moral weight as well as if there is a 1:1 correspondence or should I not do that?

Is this the only moral consideration you are considering on this tier? (I.E, there may be other moral considerations, but if this is the only "vast" one, it will probably outweigh all others.)

Does the arrangement of the copies reality fluid matter? Omega is usually thought of as a computer, so I am considering the file system. He might have 3 copies in 1 file for resilience, such as in a RAID array. Or he can have 3 copies that link to 3 files, such as in just having Sim001.exe and Sim002.exe and Sim003.exe having the exact same contents and being in the same folder. In both cases, the copies are identical. And if they are being run simultaneously and updated simultaneously, then the copies might not be able to tell which structure Omega was using. Which of these are you envisioning (or would it not matter? [Or do I not understand what a RAID array is?])

Some of these questions may be irrelevant, and if so, I apologize, I'm really am not sure I understand enough about your point to reply to it appropriately, and again, it does sound thought provoking.