I'm a bit late for response, but generally I would just prefer to use the box style as the determinant of what console it's listed under. Sneak King is stylised like a 360 box so that's 360. Red Dead Redemption (360/ONE) has a ONE box style, so list it under ONE. I think that would work well because anyways it would correlate with, for instance, the cleaning up I did (and am still not finished to this day) on the Xbox / 360 demo discs. Demo discs that are playable on both consoles have a 360 look to them so I listed them under 360.
But that wouldn't really solve the ONE/XSX issue as those two retain the very same box style. That why, in this case, I would agree to default to listing under the oldest console, being Xbox One in this case and the poll shows that people would agree with this.