We've noticed that each of us integrates not just sensory information differently, but we also seem to be "wired" differently.
For instance, we are AuDHD, and I, the primary host, lean strongly to the autism behavioral side, my co-host is somewhere between, and a secondary host leans strongly to the ADHD behavioral side. Things that are easy for me can be hard for another.
We also experience senses very differently. There have been many times where one of us can smell something strongly, switch, and the other can't smell it at all.
This affects other senses as well. When I watch a 24 fps movie at a theater, for about the first 10 minutes, all I see is a strobing of still images before I finally adapt and see motion. My co-host sees continuous motion right from the start. This may relate to the temporal binding window discussed in the paper as a motivation for their research.
Our working hypothesis since we were finally diagnosed has been that identity is, at least in part, an integration of both sensory information as well as how strongly various brain regions are activated by whichever identity or identities are most active at a particular time.
Lastly, we have the ability to "take control" over just part of the body. For example, for whatever reason, the motion of stirring a sauce is difficult to me, but it's trivial for another, so sometimes they'll take control of our arms to stir the pot while cooking. To me it feels like my arms have disappeared and someone else's arms are now attached and stirring the pot. This may be temporal binding window related because we do seem to experience sensory information at different speeds and this might cause us to get that alien hand feeling, which is sort of opposite of the rubber hand illusion.
So, I suspect that each of us would react differently to the rubber hand illusion test.