Before the final Union album was released, a preview of a sort was released by the record company to generate interest. It contains significantly different mixes of most of the ABWH group's material.
However, it's also been documented that a bootleg release entitled The Perfect Union collects outtakes and demos from the period. So it appears that perhaps the Arista promotional release was then augmented with other material for that subsequent artifact.
"Lift Me Up" is the only track of Trevor's which was included and it is Trevor's original demo, as it does not feature Jon at all and in fact Trevor's vocal is in a completely different key for the opening verse. The end solo is also somewhat different to my ears as far as the texturing (which leads me to believe that two guitars were used rather than one, then edited together).
This is the best-sounding version I've heard, which would indicate that it is straight from the promo pressing as opposed to a second or third-generation copy. Long-time fans are aware that we are missing only the demo version of "Saving My Heart" to experience how Trevor's trio of submitted songs originally sounded.