It is an interesting thought experiment. When God has selected two suitable humans for infusion with a rational soul out of a population that is genetically similar how does this enhancement manifest itself? In what way would they be intellectually different from their former group? Are the hominids theo-zombies gibbering before the Monolith while Adam and Eve are devising bio-degradable underwear?
Theological speculation or logos is trying to save mythos. Kemp on Monogenesis takes you back in time but please don’t step off the theological ramp.
Kemp on Monogenesis