What makes you say he is more versatile? Rashford used to be a wide player.
I haven't seen a lot of Iheanacho but he seems very individualistic to me. I can see where the comparisons with Sturridge come from.
Won best player at Fifa U-17 World Cup playing wide left, has played for City's youth and first teams as a #9 and a #10. From what I've seen Rashford is more of an out and out striker, although I don't doubt he could do a job out wide given his pace and dribbling ability.